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Shin splints (MTSS) in runners

Shin splints, or medial tibial stress syndrome, is exercise-induced pain along the posteromedial tibia. Load management and return to running.

The essentials, in 30 seconds

Exercise-induced pain on the posteromedial border of the tibia, reproducible on palpation over 5 continuous cm, suggests medial tibial stress syndrome (MTSS).

5-19%of runners are affected by tibial periostitis (MTSS)

What it is
No predominant periosteal inflammation; a debated pathophysiology (bone overload, traction, or both).
What points the way
The Shin Palpation Test: the pain is reproduced over a continuous length of at least 5 cm, along the posteromedial border of the tibia.
How to decide
The main differential diagnosis to rule out is stress fracture.
What to do first
Load management is the cornerstone, not complete rest, with progressive exercise targeting the soleus and the hip abductors.
How long
Return to running is only considered after 45 minutes of brisk walking without pain.

What follows covers each of these points in detail, with sources. It is there if you need it.

This topic is taught in a course: Return to sport, performance and prevention: private practice and patient self-management, on-site with Adrien Blachère.

Chapter by chapter

1 / 8

7 article chapters · 39 min in total

Chapter 1

Understanding◔ 6 min

MTSS is an overload pain of the tibia, without a predominant periosteal inflammation.

Diagnostic criterion
The pain must be palpable over at least 5 cm continuously along the tibia.
Risk factors
High BMI, increased navicular drop, increased ankle plantarflexion and increased hip external rotation.
Incidence
MTSS affects 5 to 19% of runners, and up to 56% of military recruits.
Chapter 2

Diagnosing◔ 7 min

The diagnosis of MTSS is essentially clinical, prospectively validated by Winters in 2018.

Differential
Stress fracture is distinguished by very localised pain and a positive hop test.
Classification
Classifying severity into four grades helps to set the prognosis and the tolerable load.
Shin Palpation Test
The inter-examiner reliability of the palpation test is good to excellent (kappa 0.76).
Chapter 3

Treating◔ 6 min

Load management is the cornerstone: reduce activity to the pain-free threshold, not complete rest.

Progressive exercise
Progressive strengthening of the calf and hip abductors is the foundation; abductor strengthening improves kinematics.
Prevention
Neuromuscular training and anti-pronation orthoses are the preventive measures supported by a meta-analysis; cushioning insoles are not.
Shockwaves
Reserved for chronic forms, never first line: focused shockwaves.
What to avoid
Ultrasound, LLLT, corticosteroid injections and prolonged complete rest: not recommended, sometimes harmful.
Chapter 4

Recovering◔ 4 min

Lasting prevention rests on education and on the patient's self-management of the load.

Return to running
Running should only resume after 45 minutes of brisk walking, without any pain.
Strengthening
Combining calf and hip work, plus running cadence, is the soundest preventive measure.
Criteria for resuming
20 to 30 single-leg heel raises must also be achievable without pain before running.
Chapter 5

Clinical cases◔ 5 min

MTSS in a novice runner resolved in six weeks with a combined multimodal programme.

Hip abductors
A randomised trial confirms the contribution of hip abductor strengthening over eight weeks.
Differentials
Stress fracture, CECS and arterial entrapment must always be ruled out.
Recalcitrant cases
If the picture resists or affects both legs: systematically assess for RED-S and consider an MRI.
Level of evidence
A case report remains at evidence level 5: the meta-analysis takes precedence if they diverge.
Chapter 6

RED-S◔ 6 min

RED-S is a multisystem syndrome linked to an energy deficit, affecting men and women.

REDs CAT2
Four risk levels, from green to red: this is the IOC's REDs CAT2 stratification.
Screening
A recalcitrant, bilateral or recurrent MTSS should prompt RED-S screening.
High-risk sites
An MRI and a rapid specialist opinion are required as soon as a high-risk site is suspected.
Chapter 7

In practice◔ 5 min

Refer to the doctor in case of a red flag, suspected stress fracture, treatment failure or RED-S.

MTSS Score
At the start, middle and end of treatment, the MTSS Score is measured systematically.
Complementary PROMs
LEFS and NPRS complete the follow-up, one global, the other daily.
EBP barriers
Synthesised resources, journal clubs and mentoring help to overcome the barriers to evidence-based practice.
Three pillars
The decision integrates high-level evidence, clinical expertise and patient preferences.
8

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Return to sport, performance and prevention: private practice and patient self-management

Adrien Blachère · Quentin Bouillard

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Our courses on this topic may be covered by DPC or FIFPL, the French continuing-education funding schemes, depending on your profession and situation.

Posted by

Anthony BAILLON

Physiotherapist


Physiotherapy · Sports medicine · Running

In brief

Tibial periostitis, more rigorously called medial tibial stress syndrome (MTSS), is exercise-induced pain along the posteromedial border of the tibia, reproducible on palpation over at least 5 continuous cm. The data do not support a predominant periosteal inflammation; its pathophysiology remains debated (bone overload, traction, or both), and pain that becomes focal should prompt a search for a stress fracture. Its incidence reaches 5 to 19% in runners and 35 to 56% in military recruits. Load management is its cornerstone (not complete rest), combined with progressive exercise targeting the soleus, the tibialis posterior and the hip abductors.

Clinical synthesis based on the most recent meta-analyses and international consensus statements: Winters 2018, Hamstra-Wright 2015, Warden 2014, Marques 2025 and the LIMP 2025 debate.

Clinical diagnosis Load management BSI continuum Evidence-based
5-19%
Incidence in runners
Lopes 2012 · Hamstra-Wright 2015
×2
Risk in women vs men
Yates 2004 · AJSM
5cm
Palpable length for diagnosis
Winters 2018 · BJSM

Clinical summary

  • MTSS (medial tibial stress syndrome) is exercise-induced pain along the posteromedial border of the tibia, palpable over at least 5 continuous cm (Winters 2018). It shares load factors with bone stress injuries (BSI), without being a simple periosteal inflammation; their relationship remains debated.
  • The incidence ranges from 5 to 19% in runners and 35 to 56% in military recruits (Hamstra-Wright 2015, Alessa 2024).
  • Four risk factors emerge as significant in the Hamstra-Wright 2015 meta-analysis: higher BMI, increased navicular drop, increased ankle plantarflexion range of motion, increased hip external rotation. The female sex and a history of MTSS come from other studies (Yates 2004, Newman 2013).
  • Pathophysiology: imbalance between bone remodelling ↔ resorption when faced with repeated mechanical overload. If left unmanaged, MTSS can progress to a stress fracture (Warden 2014).
  • Diagnosis is essentially clinical (Winters 2018): diffuse pain on palpation over ≥ 5 cm. A stress fracture presents with very localised pain (< 5 cm) and a positive hop test.
  • Clinical classification into grades 1 to 4 according to pain and its impact on activity. The MRI classification of Fredericson (1995) remains relevant for suspected BSI cases.
  • The management of the load (load management) is the cornerstone, not complete rest. Reduce activity to the pain-free threshold, then reintroduce it gradually.
  • Progressive exercise targets the soleus, tibialis posterior and hip abductors; adding abductor strengthening reduces pelvic drop and dynamic knee valgus on the step-down (Lashien 2024 RCT, which measured neither pain nor running).
  • The meta-analysis by Marques 2025 (Gait Posture, GRADE) retains, for prevention, neuromuscular training (high certainty according to the authors) and anti-pronation orthoses (moderate certainty); cushioning insoles showed no effect.
  • Focused shockwave therapy is an option for recalcitrant chronic forms, never as a first-line treatment. Passive manual therapies are poorly supported by the evidence.
  • Return to running follows a graded protocol (Moen 2009), guided by symptoms: tolerable pain ≤ 2/10, no residual pain 24 h after exercise.
  • Increasing running cadence by 5 to 10% reduces tibial impact forces (Crowell & Davis 2011, Luedke 2016).
  • The RED-S (relative energy deficiency in sport, IOC 2023) is a major risk factor for any bone stress injury. Always assess in recalcitrant or bilateral cases.
  • Medical referral is mandatory if a stress fracture is suspected, if conservative treatment fails (3-6 months) or if red flags are present (night pain, weight loss, fever).
  • The debate over MTSS → LIMP (Load Induced Medial-Leg Pain, Anderson et al., JOSPT 2025) reflects the conceptual shift towards a terminology that better captures an overload condition.

Contents

  1. What are the fundamentals to know about tibial periostitis (MTSS) in the runner?
    1. How is this condition defined, who does it affect and what are the risk factors?
    2. What happens in the body and how does the condition evolve naturally?
  2. How do you assess and diagnose tibial periostitis (MTSS) with certainty?
    1. Which questions should you ask to understand the patient and their history?
    2. Which clinical tests should you perform and which other conditions should you rule out?
    3. Should patients with MTSS be classified, and for what benefit?
  3. Which treatment strategies are the most effective?
    1. Where do you start? What is the recommended hierarchy of interventions?
    2. What is the place of exercise, and is there a superior approach?
    3. Manual therapies, shockwave therapy: how effective are they really?
    4. Beyond the physical: education and psychological factors.
  4. How do you secure lasting recovery and prevent flares?
    1. How do you make the patient an active participant in their recovery through self-management?
    2. When and how do you plan a safe return to running?
  5. What do real clinical cases teach us?
    1. Real case: novice runner, Ramteke 2024.
    2. The diagnostic challenge: when MTSS mimics another condition.
    3. Study of complex cases.
  6. The major systemic factor: RED-S and the BSI continuum
    1. What is RED-S and when should you think of it?
    2. BSI risk stratification: from MTSS to high-risk fracture.
  7. How do you apply these recommendations concretely in your practice?
    1. When, and to which other healthcare professionals, should you refer?
    2. How do you measure outcomes and overcome barriers to implementation?

What are the fundamentals to know about tibial periostitis (MTSS) in the runner?

In this chapter: contemporary definition of MTSS (and the LIMP 2025 debate), consolidated epidemiology (Lopes 2012, Hamstra-Wright 2015, Alessa 2024), risk factors identified by meta-analysis (Hamstra-Wright 2015, Reinking 2017), the pathophysiology of bone overload and the natural trajectory towards stress fracture (Warden 2014).

Tibial periostitis, more rigorously called medial tibial stress syndrome (MTSS) in the scientific literature, is one of the most common overuse conditions in runners and military personnel.¹ The historical term “periostitis” is misleading: the data do not support a predominant periosteal inflammation. The pathophysiology remains debated, between bone overload of the tibia, related to bone stress injuries (BSI), traction at the musculo-aponeurotic insertions, or both.²,¹³

How is this condition defined, who does it affect and what are the risk factors?

MTSS is defined as exercise-induced pain along the posteromedial border of the tibia.¹ The consensus diagnostic criterion, prospectively validated by Winters and colleagues (BJSM 2018), requires that the pain be reproducible on palpation over at least 5 continuous cm.³ This “diffuse” character is essential to distinguish it from a stress fracture, whose pain is focal.

The epidemiology has been clarified by several recent systematic reviews 🏃:

  • In the recreational and competitive runner, the incidence of MTSS ranges from 5-19% depending on the cohort (Lopes 2012, Hamstra-Wright 2015).⁴,⁵
  • In military recruits, the incidence reaches 35-56% according to the narrative review by Alessa et al. 2024 (Cureus), with a historical study by Yates & White 2004 (AJSM, n = 124 naval recruits) reporting a 35% incidence over 10 weeks of training.⁶,⁷
  • MTSS accounts for 13 to 17% of all running-related injuries (Lopes 2012).⁴
  • The Saad 2025 scoping review confirms the wide geographical heterogeneity: prevalence of 5.4% (USA) to 69.5% (India) depending on the practice setting.⁸
5-19%Incidence in runners
35-56%Military recruits
13-17%Of runners’ injuries
×1.7RR, highly pronated feet

The reference meta-analysis by Hamstra-Wright et al. (BJSM 2015) included 21 studies, of which nine factors were eligible for pooling, and highlighted only four significant risk factors, all expressed as weighted mean difference (MD):⁵

  • Higher body mass index (BMI) (MD 0.79; 95% CI 0.38 to 1.20).
  • Increased drop of the navicular (navicular drop, MD 1.19 mm; 95% CI 0.54 to 1.84): marker of excessive pronation.
  • Increased ankle plantarflexion range of motion (MD 5.94°; 95% CI 3.65 to 8.24).
  • Increased hip external rotation range of motion (MD 3.95°; 95% CI 1.78 to 6.13).

Ankle dorsiflexion and the Q angle are, on the contrary, clearly ruled out by this pooling.⁵ Female sex and a history of injury do not appear in it: only continuous variables, reported as means and standard deviations in at least three studies, could be entered. These two factors come from other studies. In the naval recruits of Yates & White 2004, 53% of women developed MTSS versus 28% of men, a relative risk of 2.03.⁷ The meta-analysis by Newman 2013 (Open Access J Sports Med), conducted in runners, for its part finds female sex (RR 1.71; 95% CI 1.15 to 2.54) and a history of MTSS (RR 3.74; 95% CI 1.17 to 11.91) among the significantly associated factors.⁹

📊 MTSS risk factors in runners: pooled effects (Newman 2013 meta-analysis)

Relative risk (RR) for dichotomous variables, standardised mean difference (SMD) for continuous variables; 10 pooled studies

MTSS risk factors - Newman 2013 meta-analysis Pooled effect (RR or SMD; the longer the bar, the stronger the association) History of MTSS RR 3.74 Female sex RR 1.71 Hip external rotation ↑ SMD 0.67 Navicular drop ↑ SMD 0.26 BMI ↑ SMD 0.24 Null threshold = no effect

Source: Newman P, Witchalls J, Waddington G, Adams R. Open Access J Sports Med. 2013;4:229-241. Five of the pooled factors reach statistical significance; hip external rotation is significant only in men.

What happens in the body and how does the condition evolve naturally?

The modern pathophysiology of MTSS, supported by the critical reviews of Moen 2009, Beck 1998 and Warden 2014, mainly describes a bone overload of the tibial cortex rather than a simple periosteal inflammation; the role of traction remains debated.¹⁰,¹¹,²,¹³ The central mechanism is a repeated mechanical overload that exceeds the bone’s capacity to adapt by remodelling. 🦴

The process unfolds in several stages:

  1. Cumulative load: repeated running impacts induce accelerated bone remodelling.
  2. Resorption / formation imbalance: if volume or intensity exceeds adaptation, the rate of osteoclastic resorption exceeds osteoblastic formation.
  3. Microdamage and cortical porosity: the negative balance leads to an accumulation of microfractures, increased porosity of the tibial cortex and decreased bone stiffness.²,¹¹
  4. Diffuse pain: this stress reaction manifests clinically as the characteristic pain over ≥ 5 cm.

A histological analysis (Johnell 1982, cited by Beck 1998) showed that the lesion involves not only the periosteum but also the bone cortex and the marrow, definitively redirecting management towards mechanical load management rather than towards anti-inflammatory drugs.¹¹

MTSS is not a simple periosteal inflammation; its relationship with stress fracture remains debated, and pain that becomes focal should prompt a search for one.

The natural course can be unfavourable if the load is not modified. Warden et al. (2014) describe a clinico-radiological spectrum ranging from normal adaptive remodelling to complete fracture, passing through stress reaction (bone oedema on MRI, Fredericson grade 1-3) and incomplete stress fracture (Fredericson grade 4).²,¹² Continuing training despite pain promotes the coalescence of microdamage.

  • MTSS is an overload pain of the tibia, without a predominant periosteal inflammation; its pathophysiology remains debated. The pain must be palpable over at least 5 continuous cm (Winters 2018).
  • The Hamstra-Wright 2015 meta-analysis retains only four significant risk factors: high BMI, increased navicular drop, increased ankle plantarflexion and increased hip external rotation. The female sex and history of MTSS stand out in Yates 2004 and Newman 2013.
  • The cause is an imbalance between bone formation and resorption due to excessive mechanical stress, which can lead to a stress fracture if activity is not modified.
  • The incidence is 5-19% in runners and 35-56% in military recruits; recurrences are frequent without appropriate load management.
Bibliography: Chapter 1
  1. Winters M, Eskes M, Weir A, et al. Treatment of medial tibial stress syndrome: a systematic review. Sports Med. 2013;43(12):1315-1333. PMID 23979968.
  2. Warden SJ, Davis IS, Fredericson M. Management and prevention of bone stress injuries in long-distance runners. J Orthop Sports Phys Ther. 2014;44(10):749-765. PMID 25103133.
  3. Winters M, Bakker EWP, Moen MH, Barten CC, Teeuwen R, Weir A. Medial tibial stress syndrome can be diagnosed reliably using history and physical examination. Br J Sports Med. 2018;52(19):1267-1272. PMID 28179260.
  4. Lopes AD, Hespanhol Júnior LC, Yeung SS, Costa LO. What are the main running-related musculoskeletal injuries? A systematic review. Sports Med. 2012;42(10):891-905. PMID 22827721.
  5. Hamstra-Wright KL, Bliven KCH, Bay C. Risk factors for medial tibial stress syndrome in physically active individuals such as runners and military personnel: a systematic review and meta-analysis. Br J Sports Med. 2015;49(6):362-369. PMID 25185588.
  6. Alessa M, Almutairi YO, Alquhayz M, et al. Highlights of medial tibial stress syndrome in military recruits: a narrative review. Cureus. 2024;16(12):e75376. PMC 11629594.
  7. Yates B, White S. The incidence and risk factors in the development of medial tibial stress syndrome among naval recruits. Am J Sports Med. 2004;32(3):772-780. PMID 15090396.
  8. Saad MA, Jamal JM, Aldhafiri AT, Alkandari SA. Medial tibial stress syndrome: a scoping review of epidemiology, biomechanics, and risk factors. Cureus. 2025;17(3):e81463. PMC 11958822.
  9. Newman P, Witchalls J, Waddington G, Adams R. Risk factors associated with medial tibial stress syndrome in runners: a systematic review and meta-analysis. Open Access J Sports Med. 2013;4:229-241. PMID 24379729.
  10. Moen MH, Tol JL, Weir A, Steunebrink M, De Winter TC. Medial tibial stress syndrome: a critical review. Sports Med. 2009;39(7):523-546. PMID 19530750.
  11. Beck BR. Tibial stress injuries. An aetiological review for the purposes of guiding management. Sports Med. 1998;26(4):265-279. PMID 9820925.
  12. Fredericson M, Bergman AG, Hoffman KL, Dillingham MS. Tibial stress reaction in runners. Correlation of clinical symptoms and scintigraphy with a new magnetic resonance imaging grading system. Am J Sports Med. 1995;23(4):472-81. PMID 7573660.
  13. Anderson LM, Warden SJ, Willy RW, Bonanno DR, Menz HB. Medial tibial stress syndrome needs a new name: make no bones about it. J Orthop Sports Phys Ther. 2025;55(10):621-622. PMID 40985462.

How do you assess and diagnose tibial periostitis (MTSS) with certainty?

Axial STIR MRI of the leg: thickening and high signal of the fascia and intermuscular septa without any periosteal reaction of the tibia, a picture of severe medial tibial stress syndrome (shin splint) in an ultramarathon runner.

MRIAxial STIR MRI of the leg: thickening and high signal of the fascia and intermuscular septa without any periosteal reaction of the tibia, a picture of severe medial tibial stress syndrome (shin splint) in an ultramarathon runner.

Source : Lucas et al., Extreme Physiology & Medicine, 2016, figure 3 · CC BY

In this chapter: structured history-taking and training factors (Tweed 2008), the Shin Palpation Test at ≥ 5 cm (Winters 2018), rigorous differential diagnosis (stress fracture, CECS Aweid 2012, Dean 2024, popliteal artery entrapment), 4-grade clinical classification and the Fredericson MRI classification (1995).

The diagnosis of MTSS rests essentially on clinical examination, with sensitivity and reliability prospectively validated by Winters 2018 in 46 patients (high inter-examiner kappa for palpation of the painful length).¹ Imaging is not necessary as a first-line step, except in case of diagnostic doubt or suspected stress fracture. 🏃

Which questions should you ask to understand the patient and their history?

The history-taking aims to reconstruct the history of the injury and to identify training errors, the main triggering factor.² The areas of questioning:

  • Pain characteristics: dull, diffuse pain along the distal third of the posteromedial border of the tibia, appearing during exercise, possibly easing at first after the warm-up, then returning with greater intensity when the activity is continued or stopped.²,³
  • Training history: any rapid increase in volume, in intensity, in frequency or change of surface (track to road) or of footwear within the 4 to 6 weeks preceding the symptoms is suspect.⁴
  • History: the history of MTSS or running injury is one of the strongest predictors of recurrence.⁵
  • Systemic factors: systematically ask about energy intake, the menstrual cycle in women, a history of stress fractures, glucocorticoid use (flags for RED-S and high-risk BSI).
  • Biomechanical factors and equipment: type of footwear, wear, insoles, foot type (more pronated = increased risk, with RR 1.7 in Yates 2004).⁶

Which clinical tests should you perform and which other conditions should you rule out?

The central clinical test is the “Shin Palpation Test”: palpation reproduces the pain over a continuous length of at least 5 cm along the posteromedial border of the tibia, generally in its distal third. Inter-examiner reliability was shown to be good to excellent (Winters 2018, kappa 0.76).¹ 🔬

Other tests are useful:

  • Hop test (single-leg hop on the spot, 10x): sharp, focal pain should raise suspicion of a stress fracture rather than MTSS.⁷
  • Fulcrum test: bimanual pressure on the tibia; positive if localised pain suggestive of a fracture (Milgrom 2021).⁷
  • Functional tests: single-leg heel raises (ability to do 20-30 repetitions without pain = progression criterion), single-leg squat (looking for pelvic drop and dynamic valgus).
DiagnosisPain locationCharacterSuggestive testImaging
MTSSDiffuse, ≥ 5 cm posteromedial border of tibiaDull, exercise, post-exerciseDiffuse palpationNot necessary
Tibial stress fractureFocal, < 5 cm, exquisitely tender pointSharp, may be nocturnalHop test +, fulcrum +MRI (Fredericson 1-4)
CECSCompartment (often anterior)Cramp/pressure, relief < 5 min restIntracompartmental pressureDynamic pressure measurement
Popliteal artery entrapmentCalfExertional cramps, dead-leg sensation, paraesthesiaLoss of dorsalis pedis pulse on plantarflexionDynamic Doppler ultrasound
L4-L5 radiculopathyRadicular distributionBurning, paraesthesiaLasègue, neurological examinationLumbar MRI if red flag

The critical differential diagnosis is the stress fracture of the tibia, placed by Warden 2014 on the same continuum.⁸ The signs pointing towards a fracture:

  • Very localised pain (< 5 cm) at a point of exquisite tenderness.
  • Pain at rest, even nocturnal (red flag).
  • Positive hop test.
  • Persistence despite correctly applied rest.

The chronic exertional compartment syndrome (CECS) presents with predictable cramping pain, increasing during exercise and disappearing within a few minutes of stopping. The reference diagnostic test remains measurement of intracompartmental pressure, as confirmed by the recent systematic review Dean 2024 (J ISAKOS, 25 surgical studies, 1018 patients; return to sport after fasciotomy ranges from 26 to 100%).⁹,¹⁰

The entrapment of the popliteal artery, which is rarer, can mimic MTSS: look for loss of the dorsalis pedis pulse on resisted plantarflexion and confirm with dynamic Doppler ultrasound.

Refer for urgent medical consultation

  • Very localised tibial pain persisting at rest (suspected stress fracture), especially on the anterior side (high-risk region).
  • Pain at night not related to weight-bearing.
  • History of cancer, unexplained weight loss, fever, night sweats.
  • Bilateral pain in a young woman with amenorrhoea or low energy intake (suspected RED-S, see chapter 6).
  • Cramping pain + transient paresis on exertion (acute CECS, rare surgical emergency).
  • Failure of well-conducted conservative treatment over 3 to 6 months.

Should patients with MTSS be classified, and for what benefit?

Yes, classifying MTSS helps to assess severity, set a prognosis and guide the rehabilitation strategy, in particular the return to running.

A 4-grade clinical classification, derived from Galbraith & Lavallee (2009) and widely used:¹¹

📈 Clinical classification of MTSS: 4 grades of severity

Relationship between pain and activity (Galbraith & Lavallee 2009)

MTSS clinical classification - 4 grades G1 Mild Pain AFTER activity only Activity possible G2 Moderate Pain DURING without limiting performance Load adaptation G3 Severe Pain DURING that limits performance Marked reduction G4 Disabling Daily pain mandatory stop Rest from sport

Source: Galbraith RM, Lavallee ME. Medial tibial stress syndrome: conservative treatment options. Curr Rev Musculoskelet Med. 2009;2(3):127-133. The classification guides the prescription of tolerable load.

This grading has a clear prognostic value: grade 1 allows continuation of a modified activity, whereas grade 4 requires rest from sport and a thorough reassessment (suspected associated stress fracture).

For suspected BSI cases, the Fredericson MRI classification (1995) remains the reference:¹²

  • Grade 1: isolated periosteal oedema.
  • Grade 2: marrow oedema visible on T2 sequences.
  • Grade 3: marrow oedema on T1 and T2 sequences.
  • Grade 4a: multiple areas of intracortical signal.
  • Grade 4b: visible fracture line (significantly longer recovery time).

The validation of this MRI classification by Nattiv 2013, confirmed by paediatric studies (Stein 2020), shows that grade 4b significantly prolongs the time to return to sport.

Critique and controversy: the “MTSS → LIMP” debate (Anderson 2025)

🤔 The nomenclature itself has been debated for a long time. The term “periostitis” is anachronistic because the histological data do not support a predominant periosteal inflammation.¹¹ More recently, Anderson et al. (JOSPT 2025) propose renaming MTSS as LIMP (Load Induced Medial-Leg Pain).¹³ Their argument:

  • The term “tibial stress” is easily confused with “bone stress injury” (BSI), leading to unjustified excessive rest.
  • The exact pathophysiology of MTSS remains debated: bone overload, traction of the deep crural fascia by the soleus/tibialis posterior, or both?
  • “LIMP” directs management towards load management without presupposing the underlying pathology.

This proposal is not yet consensual but it reflects an important conceptual shift: clinically distinguishing MTSS (diffuse pain, low risk of rapid progression) from BSI (focal pain, potentially high risk) is more relevant than a purely etymological debate.

  • The diagnosis of MTSS is essentially clinical: pain reproducible on palpation over ≥ 5 cm along the posteromedial border of the tibia (Winters 2018).
  • The main differential diagnosis is the stress fracture, characterised by very localised pain and a positive hop test.
  • The CECS (cramping pain with relief < 5 min rest) and popliteal artery entrapment must also be ruled out.
  • Classifying severity into 4 grades helps to set the prognosis and the dose of tolerable load.
  • The debate MTSS → LIMP (Anderson 2025) reframes the condition as “load-induced pain” rather than as a periosteal inflammation.
Bibliography: Chapter 2
  1. Winters M, Bakker EWP, Moen MH, Barten CC, Teeuwen R, Weir A. Medial tibial stress syndrome can be diagnosed reliably using history and physical examination. Br J Sports Med. 2018;52(19):1267-1272. PMID 28179260.
  2. Tweed JL, Avil SJ, Campbell JA, Barnes MR. Etiologic factors in the development of medial tibial stress syndrome: a review of the literature. J Am Podiatr Med Assoc. 2008;98(2):107-111. PMID 18347118.
  3. Moen MH, Tol JL, Weir A, Steunebrink M, De Winter TC. Medial tibial stress syndrome: a critical review. Sports Med. 2009;39(7):523-546. PMID 19530750.
  4. Reinking MF, Austin TM, Richter RR, Krieger MM. Medial tibial stress syndrome in active individuals: a systematic review and meta-analysis of risk factors. Sports Health. 2017;9(3):252-261. PMID 27729482.
  5. Hamstra-Wright KL, Bliven KCH, Bay C. Risk factors for medial tibial stress syndrome in physically active individuals such as runners and military personnel: a systematic review and meta-analysis. Br J Sports Med. 2015;49(6):362-369. PMID 25185588.
  6. Yates B, White S. The incidence and risk factors in the development of medial tibial stress syndrome among naval recruits. Am J Sports Med. 2004;32(3):772-780. PMID 15090396.
  7. Milgrom C, Zloczower E, Fleischmann C, et al. Medial tibial stress fracture diagnosis and treatment guidelines. J Sci Med Sport. 2021;24(6):526-530. PMID 33298373.
  8. Warden SJ, Davis IS, Fredericson M. Management and prevention of bone stress injuries in long-distance runners. J Orthop Sports Phys Ther. 2014;44(10):749-765. PMID 25103133.
  9. Aweid O, Del Buono A, Malliaras P, et al. Systematic review and recommendations for intracompartmental pressure monitoring in diagnosing chronic exertional compartment syndrome of the leg. Clin J Sport Med. 2012;22(4):356-370. PMID 22627653.
  10. Dean RS, Farley KX, Waterman BR, Guettler J, Bicos J. Chronic exertional compartment syndrome is frequently diagnosed through static compartment pressure measurements and managed with fasciotomy: a systematic review. J ISAKOS. 2024;9(1):71-78. PMID 37778507.
  11. Galbraith RM, Lavallee ME. Medial tibial stress syndrome: conservative treatment options. Curr Rev Musculoskelet Med. 2009;2(3):127-133. PMID 19809896.
  12. Fredericson M, Bergman AG, Hoffman KL, Dillingham MS. Tibial stress reaction in runners. Correlation of clinical symptoms and scintigraphy with a new magnetic resonance imaging grading system. Am J Sports Med. 1995;23(4):472-81. PMID 7573660.
  13. Anderson LM, Warden SJ, Willy RW, Bonanno DR, Menz HB. Medial tibial stress syndrome needs a new name: make no bones about it. J Orthop Sports Phys Ther. 2025;55(10):621-622. PMID 40985462.

Which treatment strategies are the most effective?

In this chapter: therapeutic hierarchy with load management as the cornerstone (Warden 2014), progressive exercise and hip abductor strengthening (Lashien 2024, Verrelst 2014), focused shockwave therapy (limited evidence), review of treatments in runners (Teles 2026), Marques 2025 preventive meta-analysis (GRADE), education and psychosocial factors.

The effectiveness of MTSS treatment rests on rigorous management of mechanical stresses and the progressive increase of tissue capacity to tolerate them.¹ Exercise and education far outweigh passive therapies in terms of level of evidence.

Where do you start? What is the recommended hierarchy of interventions?

The initial and most crucial intervention is management of the load (load management).¹,² This does not mean complete rest, which deconditions the tissues, but a reduction of activity to a level that does not provoke pain during, after or the day after exercise. The therapeutic hierarchy:

📐 Hierarchy of MTSS interventions: from the fundamental to the adjunct

Adapted from Warden 2014 (JOSPT) and Winters 2013 (Sports Med systematic review)

LEVEL
1
Education + load management
Reduce activity to the pain-free threshold · identify training errors · cadence +5-10% · 10% rule
LEVEL
2
Progressive exercise programme
Strengthening of the soleus, tibialis posterior, foot intrinsics · hip abductors (Lashien 2024)
LEVEL
3
Targeted adjuncts (recalcitrant forms)
Focused shockwave therapy · arch-support orthoses (Teles 2026: short-term effect; in prevention, Marques 2025, moderate certainty)
LEVEL
⊗
To avoid as first-line treatment
Prolonged complete rest · therapeutic ultrasound · LLLT · corticosteroid injections (insufficient or harmful evidence)

Level 1 is essential. Adjuncts must never delay or replace load management.

What is the place of exercise, and is there a superior approach?

Therapeutic exercise is a central pillar. 🏃 It aims to improve the capacity of the lower-leg complex to absorb and transmit forces. The programmes share the principle of progressive loading (Warden 2014).¹

In runners, the most recent systematic review (Teles 2026: three trials, 130 runners) finds no clearly superior non-invasive treatment: arch-support orthoses combined with multimodal management reduce pain in the short term against sham, with no lasting effect, and added exercises do no better than their comparators.¹¹ Load management and education therefore remain the first line by pathophysiological reasoning, with no trial to separate them.

Priority muscle targets:

  • Soleus and tibialis posterior: major pivots of pronation control and shock absorption in running (Verrelst 2014).³
  • Hip abductors and external rotators: a recent RCT by Lashien et al. (J Orthop Surg Res 2024, n = 40 MTSS runners) shows that 8 weeks of functional strengthening of the hip abductors, combined with a standard physiotherapy programme, significantly reduce pelvic drop and dynamic knee valgus, measured on 2D video during a single-leg step-down (not during running).⁴ This effect is consistent with the chain pathomechanics identified by Bramah 2018 (AJSM).⁵
  • Foot intrinsics: useful for medial longitudinal stability.

The progression follows a classic model: isometric → concentric → eccentric → plyometric, always within a tolerable pain threshold (≤ 2/10 according to Crowell-Davis 2011).⁶

For prevention, the reference meta-analysis is now that of Marques et al. (Gait Posture 2025, 12 RCTs, 8197 participants, GRADE assessment):⁷

  • The neuromuscular training (4 studies, 3887 participants) is recommended for prevention, with high certainty according to the authors.
  • The anti-pronation orthoses (overpronation insoles) (4 studies, 1047 participants) are recommended for prevention, with moderate certainty, with a confidence interval that touches the point of no effect.
  • The cushioning insoles (2 studies, 1571 participants) showed no preventive effect (high certainty): the authors advise against them for this indication. Neither static stretching nor specific socks are supported by the evidence.⁷
  • This conclusion converges with the historical RCT by Bonanno 2018 (BJSM, n = 306 Australian naval recruits), which showed a 34% reduction in the combined risk of MTSS / patellofemoral pain / Achilles tendinopathy / plantar fasciitis with prefabricated orthoses.⁸

Manual therapies, shockwave therapy: how effective are they really?

Passive therapies are frequently used, but the evidence is heterogeneous:

InterventionLevel of evidenceRecommendation
Load management + educationLow (no direct trial in runners; pathophysiological reasoning)First line, despite the low certainty
Progressive exercise (calf + hip)Low (Teles 2026: three trials, no clearly superior treatment)Recommended
Neuromuscular training (prevention)High (GRADE, Marques 2025)Recommended for prevention
Anti-pronation orthoses (prevention)Moderate (GRADE, Marques 2025)Recommended for prevention
Cushioning insoles (prevention)High (in favour of no effect)Not recommended for prevention
Focused shockwave therapy (chronic forms)Low (limited trials)Option for recalcitrant cases
Manual therapies (massage, mobilisations)LowSymptomatic adjunct
Therapeutic ultrasoundVery low / NoneNot recommended
LLLT (low-level laser therapy)Very lowNot recommended
Corticosteroid injectionsVery low / HarmfulContraindicated (risk of bone weakening)
Prolonged complete restHarmfulTo be avoided (tissue deconditioning)

The focused extracorporeal shockwave therapy (ESWT) has been the subject of encouraging studies (systematic review Bagherzadeh-Cham 2022, as well as the pilot RCT Moen 2012) showing a reduction in pain and time to return to sport in chronic MTSS.⁹ However, methodological heterogeneity remains high and shockwave therapy must never replace active treatment.

The passive manual therapies (massage, dry needling, mobilisations) have not demonstrated robust efficacy on the underlying pathology. They may provide short-term symptomatic relief but do not modify the bone overload.

Beyond the physical: education and psychological factors

Therapeutic education is probably the most cost-effective intervention. 🧠 It covers:

  • The nature of the injury: MTSS is a load-induced pain, not a simple inflammation; this message rules out both anti-inflammatory drugs and complete rest. Pain that becomes focal, nocturnal or that does not settle should prompt a search for a stress fracture.
  • Modifiable training errors: volume, intensity, surface, cadence, footwear.
  • Interpreting pain: pain ≤ 2/10 + resolution within 24 h = tolerable overload; residual pain = overload to be corrected.
  • Optimising systemic factors: sleep, nutrition (calcium, vitamin D), stress management, RED-S screening (see chapter 6).¹⁰
The patient who understands why they must modulate their load holds the main lever of their recovery. Therapeutic education is the least costly and the most effective of interventions.
  • ✅ The management of the load is the cornerstone: reduction of activity to the pain-free threshold, not complete rest.
  • ✅ Progressive exercise (soleus, tibialis posterior, hip abductors) is the foundation; abductor strengthening improves kinematics (Lashien 2024 RCT, without pain measurement).
  • ✅ The neuromuscular training and anti-pronation orthoses are the preventive interventions supported by the Marques 2025 meta-analysis (GRADE); cushioning insoles showed no effect.
  • ✅ The focused shockwaves are an option for recalcitrant chronic forms, never first line.
  • ❌ Ultrasound, LLLT, corticosteroid injections, prolonged complete rest: not recommended or harmful.
Bibliography: Chapter 3
  1. Warden SJ, Davis IS, Fredericson M. Management and prevention of bone stress injuries in long-distance runners. J Orthop Sports Phys Ther. 2014;44(10):749-765. PMID 25103133.
  2. Winters M, Eskes M, Weir A, et al. Treatment of medial tibial stress syndrome: a systematic review. Sports Med. 2013;43(12):1315-1333. PMID 23979968.
  3. Verrelst R, De Clercq D, Vanrenterghem J, et al. The role of proximal dynamic joint stability in the development of exertional medial tibial pain: a prospective study. Br J Sports Med. 2014;48(5):388-93. PMID 24100288.
  4. Lashien SA, Abdelnaeem AO, Gomaa EF. Effect of hip abductors training on pelvic drop and knee valgus in runners with medial tibial stress syndrome: a randomized controlled trial. J Orthop Surg Res. 2024;19(1):700. PMC 11520670.
  5. Bramah C, Preece SJ, Gill N, Herrington L. Is there a pathological gait associated with common soft tissue running injuries? Am J Sports Med. 2018;46(12):3023-3031. PMID 30193080.
  6. Crowell HP, Davis IS. Gait retraining to reduce lower extremity loading in runners. Clin Biomech (Bristol). 2011;26(1):78-83. PMID 20888675.
  7. Marques TBT, Rangel RPS, Martins LV, et al. Preventive interventions for medial tibial stress syndrome: Systematic review and meta-analysis. Gait Posture. 2025;122:92-98. PMID 40633262.
  8. Bonanno DR, Murley GS, Munteanu SE, Landorf KB, Menz HB. Effectiveness of foot orthoses for the prevention of lower limb overuse injuries in naval recruits: a randomised controlled trial. Br J Sports Med. 2018;52(5):298-302. PMID 29056595.
  9. Moen MH, Rayer S, Schipper M, et al. Shockwave treatment for medial tibial stress syndrome in athletes; a prospective controlled study. Br J Sports Med. 2012;46(4):253-7. PMID 21393260.
  10. Mountjoy M, Ackerman KE, Bailey DM, et al. 2023 International Olympic Committee's (IOC) consensus statement on Relative Energy Deficiency in Sport (REDs). Br J Sports Med. 2023;57(17):1073-1097. PMID 37752011.
  11. Teles AI, da Silva Carto JP, Parpa K, Thuany M, de Vasconcelos GS. Load-induced medial leg pain in runners: A systematic review of non-invasive treatment approaches. Phys Ther Sport. 2026;81:101962. PMID 42462658.

How do you secure lasting recovery and prevent flares?

In this chapter: self-management guided by a training log, the “traffic light” rule, functional criteria for return to running (Moen 2009), cadence modification (Crowell-Davis 2011, Luedke 2016), long-term maintenance with combined calf + hip strengthening.

Preventing recurrence is a central issue: without appropriate management, the recurrence rate is high. It rests on two pillars: empowering the patient and planning a return to running based on criteria, not on a fixed calendar.¹

How do you make the patient an active participant in their recovery through self-management?

Therapeutic education is the cornerstone of prevention. 🏃‍♂️ Making the patient competent changes their role from passive to active, which is a major prognostic factor.²

Self-management is built around three levers:

  1. Understanding the mechanism: the patient must understand that MTSS is the result of a load exceeding the bone’s capacity to adapt, not an inevitability.³
  2. Daily monitoring tool: the training log (paper or app such as Strava/TrainingPeaks) recording distance, duration, perceived exertion (RPE), pain 0-10 makes it possible to objectify the cause-and-effect relationship.⁴
  3. A simple “traffic light” rule: described by Moen 2009 and widely adopted:¹

🚦 Pain “traffic light” rule for adapting the load

Daily self-management tool, validated by expert consensus

Green orange red traffic light rule self-management MTSS 0-2 GREEN LIGHT Pain ≤ 2/10 Continue load 2-4 ORANGE LIGHT Pain 2-4/10 Cap / adapt ≥5 RED LIGHT Pain ≥ 5/10 or persists > 24 h → rest

Residual pain persisting 24 h after exercise signals that the previous load was excessive: reduce by 20 to 30% at the next session.

Adherence to the home exercise programme is just as central. Progressive strengthening of the soleus, tibialis posterior and hip abductors must become a long-term maintenance routine, even in the absence of pain.⁵

When and how do you plan a safe return to running?

Return to running is a process that is progressive, individualised and criteria-based. 📈 Rushing the return is one of the main causes of recurrence.

Functional prerequisites before resuming running:

  • Brisk walking for 45 minutes without any pain.¹
  • Ability to perform 20 to 30 single-leg heel raises without pain.
  • Negative hop test bilaterally.
  • No pain on palpation at rest.

The graded protocol of Moen 2009 remains the reference: a progressive walk/run alternation over several weeks, respecting the tolerable pain threshold. One guideline (not validated by RCT but widely adopted) is not to increase the total running volume by more than 10% per week.⁶

During this phase, three parameters must be monitored:

  1. Pain: ≤ 2/10 during and after, resolving within 24 h.
  2. Running technique: this is the ideal time for stride re-education (gait retraining). An increase in cadence of 5-10% significantly reduces tibial impact forces (Crowell-Davis 2011, Luedke 2016).⁷,⁸
  3. Strengthening: continue and intensify in parallel, introduce plyometrics when tolerated.
Return to running is not a calendar but a series of stages. Each stage completed without pain opens the next; the slightest residual pain 24 h after the last session requires a return to the previous stage.

Critique and controversy: the “10% rule” and pronation

💡 The famous “10% rule” of weekly increase is a clinical heuristic, not a rule validated by a high-quality controlled trial. Some trained runners tolerate more; novices and post-injury patients may need an even slower progression. The individualisation guided by pain takes precedence.

The excessive pronation (increased navicular drop) is a robust risk factor (Hamstra-Wright 2015) but the routine prescription of orthoses is not universally beneficial. The Marques 2025 meta-analysis (GRADE) retains anti-pronation orthoses for prevention, with moderate certainty; as treatment, their place remains to be individualised according to the biomechanical profile.⁵

  • Lasting prevention of MTSS rests on education and self-management of the load.
  • A return to running should only be started after 45 minutes of brisk walking without pain.
  • The return is extremely gradual (Moen's walk/run alternation), with pain monitoring (≤ 2/10, resolving within 24 h).
  • The combined calf + hip strengthening and stride re-education (cadence +5-10%) are the strongest active preventive strategies.
Bibliography: Chapter 4
  1. Moen MH, Tol JL, Weir A, Steunebrink M, De Winter TC. Medial tibial stress syndrome: a critical review. Sports Med. 2009;39(7):523-546. PMID 19530750.
  2. Galbraith RM, Lavallee ME. Medial tibial stress syndrome: conservative treatment options. Curr Rev Musculoskelet Med. 2009;2(3):127-133. PMID 19809896.
  3. Warden SJ, Davis IS, Fredericson M. Management and prevention of bone stress injuries in long-distance runners. J Orthop Sports Phys Ther. 2014;44(10):749-765. PMID 25103133.
  4. Gabbett TJ. The training-injury prevention paradox: should athletes be training smarter and harder? Br J Sports Med. 2016;50(5):273-280. PMID 26758673.
  5. Marques TBT, Rangel RPS, Martins LV, et al. Preventive interventions for medial tibial stress syndrome: Systematic review and meta-analysis. Gait Posture. 2025;122:92-98. PMID 40633262.
  6. Nielsen RO, Bertelsen ML, Møller M, et al. Training load and structure-specific load: applications for sport injury causality and data analyses. Br J Sports Med. 2018;52(16):1016-1017. PMID 28739835.
  7. Crowell HP, Davis IS. Gait retraining to reduce lower extremity loading in runners. Clin Biomech (Bristol). 2011;26(1):78-83. PMID 20888675.
  8. Luedke LE, Heiderscheit BC, Williams DS, Rauh MJ. Influence of step rate on shin injury and anterior knee pain in high-school runners. Med Sci Sports Exerc. 2016;48(7):1244-1250. PMID 26818150.
  9. Lashien SA, Abdelnaeem AO, Gomaa EF. Effect of hip abductors training on pelvic drop and knee valgus in runners with medial tibial stress syndrome: a randomized controlled trial. J Orthop Surg Res. 2024;19(1):700. PMC 11520670.

What do real clinical cases teach us?

In this chapter: analysis of a real 2024 case report (Ramteke & Jaiswal: novice runner aged 22, resolution in 6 weeks), differential diagnoses not to be missed (CECS Dean 2024, stress fracture Milgrom 2021), complex cases with underlying RED-S.

Clinical cases offer valuable insight into the practical application of evidence-based principles, provided they are placed correctly in the hierarchy of evidence (level 5 according to the Oxford CEBM). 🧐

Real case: novice runner, Ramteke 2024

The case report by Ramteke & Jaiswal (Cureus 2024, PMC 11417438) illustrates typical management of MTSS in a novice runner.¹ Presentation:

  • Patient: 22-year-old man, novice runner who had been running irregularly for six months, four to five days a week, 30 to 45 minutes.
  • Symptom: anteromedial pain in both tibiae, appearing gradually after about 1 km on concrete, returning after 700 m despite four days of rest; stopped running after two to three weeks.
  • Examination: normal X-ray; pain 7/10 on exertion and 8/10 on walking, grade 3 tenderness on palpation, stiffness of the plantar flexors on both sides, dorsiflexors, invertors and evertors at 4-/5.

The multifaceted management over 6 weeks:

  • Phase 1 (weeks 0 to 2): education (running pattern, footwear, surface), stopping running for at least three days, cryotherapy, TENS, muscle energy techniques, talocrural and subtalar mobilisations, taping every other day.
  • Phase 2 (weeks 2 to 4): plantar flexor stretching, treadmill walking then alternating walking and running, balance on an unstable platform, strengthening of the dorsiflexors and invertors with an elastic band.
  • Phase 3 (weeks 5 and 6): weighted heel raises, squats and lunges, gradual return up to 30 minutes of continuous running.

Result: pain from 8/10 to 0/10, LEFS score from 32 to 100, MTSS score from 9/10 to 0/10, and return to 30 minutes of continuous running.¹ This single case, of evidence level 5, shows a favourable course with simple principles (load management, progressive exercise, education); it does not allow generalisation.

Another recent RCT (Lashien 2024, n = 40 MTSS runners) clinically confirms the added value of functional strengthening of the hip abductors over 8 weeks, with significant improvement in pelvic drop and dynamic knee valgus compared with the physiotherapy programme alone.²

The diagnostic challenge: when MTSS mimics another condition

Three major mimics must be systematically ruled out:

  • 🔍 Stress fracture of the tibia: the shift from diffuse to focal pain is a warning sign. Milgrom 2021 (n = 429 elite recruits) prospectively validated that the combination “pain + focal tenderness over < 1/3 of the tibial length + positive hop or fulcrum test” identifies fractures effectively.³ MRI (Fredericson grading) remains the reference imaging.⁴
  • 🔍 Chronic exertional compartment syndrome (CECS): predictable cramping pain appearing after a few minutes of running and disappearing quickly on stopping. The systematic review Dean 2024 (J ISAKOS, 25 surgical studies, 1018 patients operated on) confirms that intracompartmental pressure measurement remains the diagnostic reference test; the rate of return to sport after fasciotomy varies from 26 to 100%.⁵,⁶
  • 🔍 Popliteal artery entrapment: rare but to be considered in the presence of vascular symptoms (paraesthesia, dead-leg sensation); the key sign is loss of the dorsalis pedis pulse on resisted plantarflexion, confirmed by dynamic Doppler ultrasound.

Study of complex cases

Some cases of MTSS prove recalcitrant despite well-conducted rehabilitation. The recent literature (Tenforde, Warden) highlights three areas to explore in such cases:

  1. Systemic factors (RED-S): energy intake that is insufficient relative to expenditure (Relative Energy Deficiency in Sport) compromises bone health and recovery.⁷ See the dedicated chapter below.
  2. Psychological factors: kinesiophobia, catastrophising and performance anxiety can slow the return to sport; a cognitive-behavioural approach combined with therapeutic education is then indicated.
  3. Imaging to stratify: faced with chronic or bilateral MTSS, MRI (high-resolution T1/T2 sequences) makes it possible to place the patient on the Fredericson continuum and to differentiate pure MTSS from low-grade BSI.⁴

📐 Hierarchy of scientific evidence: where should each type of study be placed?

Decreasing strength of evidence from the top (meta-analyses) to the bottom (single cases)

LEVEL
1a
Meta-analyses & systematic reviews of RCTs
E.g.: Hamstra-Wright 2015 · Reinking 2017 · Marques 2025 · Winters 2013
LEVEL
1b
Randomised controlled trials (RCTs)
E.g.: Bonanno 2018 · Lashien 2024 · Moen 2012 ESWT
LEVEL
2
Prospective cohort studies
E.g.: Yates 2004 · Verrelst 2014 · Milgrom 2021
LEVEL
3
Case-control & cross-sectional studies
E.g.: Bramah 2018 · Sobhani 2014 · Saad 2025 (scoping)
LEVEL
4
Case series and narrative reviews
E.g.: Alessa 2024 narrative review in military personnel
LEVEL
5
Case reports (n=1) & expert opinion
E.g.: Ramteke 2024 (novice case) · Anderson 2025 (LIMP proposal)

Simplified GRADE / Oxford CEBM hierarchy. A clinical case illustrates, but never demonstrates efficacy: in case of divergence with a meta-analysis, follow the meta-analysis.

  • The case report Ramteke 2024 illustrates that MTSS in a novice runner resolves in 6 weeks with a combined programme (relative rest, strengthening, progressive loading, proprioception).
  • The Lashien 2024 randomised trial confirms the contribution of hip abductor strengthening over 8 weeks (kinematic improvement measured).
  • Always rule out: stress fracture (Milgrom 2021), CECS (Dean 2024), arterial entrapment.
  • For recalcitrant or bilateral cases, systematically assess RED-S, psychological factors and consider an MRI (Fredericson).
  • ⚠️ A case report = level of evidence 5 (the lowest). In case of divergence with a meta-analysis, follow the meta-analysis.
Bibliography: Chapter 5
  1. Ramteke SU, Jaiswal PR. Physical therapy perspectives for medial tibial stress syndrome in a novice runner: a case report. Cureus. 2024;16(8):e67647. PMC 11417438.
  2. Lashien SA, Abdelnaeem AO, Gomaa EF. Effect of hip abductors training on pelvic drop and knee valgus in runners with medial tibial stress syndrome: a randomized controlled trial. J Orthop Surg Res. 2024;19(1):700. PMC 11520670.
  3. Milgrom C, Zloczower E, Fleischmann C, et al. Medial tibial stress fracture diagnosis and treatment guidelines. J Sci Med Sport. 2021;24(6):526-530. PMID 33298373.
  4. Fredericson M, Bergman AG, Hoffman KL, Dillingham MS. Tibial stress reaction in runners. Correlation of clinical symptoms and scintigraphy with a new magnetic resonance imaging grading system. Am J Sports Med. 1995;23(4):472-81. PMID 7573660.
  5. Aweid O, Del Buono A, Malliaras P, et al. Systematic review and recommendations for intracompartmental pressure monitoring in diagnosing chronic exertional compartment syndrome of the leg. Clin J Sport Med. 2012;22(4):356-370. PMID 22627653.
  6. Dean RS, Farley KX, Waterman BR, Guettler J, Bicos J. Chronic exertional compartment syndrome is frequently diagnosed through static compartment pressure measurements and managed with fasciotomy: a systematic review. J ISAKOS. 2024;9(1):71-78. PMID 37778507.
  7. Mountjoy M, Ackerman KE, Bailey DM, et al. 2023 International Olympic Committee's (IOC) consensus statement on Relative Energy Deficiency in Sport (REDs). Br J Sports Med. 2023;57(17):1073-1097. PMID 37752011.
  8. Anderson LM, Warden SJ, Willy RW, Bonanno DR, Menz HB. Medial tibial stress syndrome needs a new name: make no bones about it. J Orthop Sports Phys Ther. 2025;55(10):621-622. PMID 40985462.

The major systemic factor: RED-S and the BSI continuum

In this chapter: Relative Energy Deficiency in Sport (RED-S) according to the IOC 2023 consensus, mechanisms of bone weakening, clinical screening, REDs CAT2 and stratification of high-risk vs low-risk BSI (Warden 2014, BJSM 2025 Delphi). An essential section for recalcitrant or bilateral MTSS, or MTSS occurring in young athletes.

Any recalcitrant, recurrent or bilateral MTSS should lead the clinician to assess the systemic background of the patient. The best-documented factor, and the most frequently underdiagnosed, is the RED-S (Relative Energy Deficiency in Sport), recognised by the IOC since 2014 and profoundly updated in 2023.¹,²

What is RED-S and when should you think of it?

RED-S describes a multisystem syndrome resulting from insufficient energy availability (low energy availability, LEA), that is, a caloric intake too low relative to sporting expenditure, independently of any formal eating disorder.² It replaces and broadens the older concept of the “female athlete triad” (Nattiv 2007) by recognising:

  • The condition affects both sexes, despite a higher prevalence in female athletes.
  • The consequences go well beyond bone health: cardiovascular, immune, endocrine, psychological, performance.
  • The 2023 IOC consensus introduces the REDs CAT2 (REDs Clinical Assessment Tool, version 2), which classifies risk on four levels (green, yellow, orange, red) accompanied by training and competition recommendations; its use is a doctor’s responsibility; the physiotherapist refers.²

The link with MTSS is direct: chronic LEA impairs bone healing, lowers bone mineral density and increases the risk of all bone stress injuries (BSI), from moderate MTSS to high-risk stress fracture.³,⁴ A study by Kraus, Tenforde et al. (BJSM 2019) in 156 male middle-distance runners showed that athletes with a high “Triad cumulative risk” score have a higher rate of BSI: the phenomenon is not exclusively female.⁵,⁹

⚠️ Clinical flags suggestive of RED-S to screen for

Simple indicators usable in a physiotherapy consultation

Clinical RED-S flags to screen for Women / people who menstruate • Amenorrhoea > 3 months • Oligomenorrhoea or irregular periods • Delayed puberty / primary amenorrhoea • Voluntary dietary restriction Men • Reduced libido / erectile dysfunction • Documented low testosterone • Dietary restriction / regular weighing • “Gravity-restricted” sport (running, cycling) Any patient (men + women) • History of stress fracture (especially multiple) • Bilateral, recurrent or recalcitrant MTSS at 3 months of well-conducted treatment • Low BMI (< 18.5) or recent unplanned weight loss • Chronic fatigue, sleep disturbance, immunodeficiency (repeated infections)

Any positive flag warrants referral to a sports physician or sports nutritionist for assessment with the REDs CAT2 (IOC 2023 consensus).

BSI risk stratification: from MTSS to high-risk fracture

MTSS is often grouped with bone stress injuries (BSI), of which it would be the mildest form (relationship debated). BSIs are divided into low-risk and high-risk sites for complications (slow healing, non-union, complete fracture).⁴,⁶ The 2025 update of the Female Athlete Triad Coalition places the femoral neck, the navicular, the anterior tibia and the fifth metatarsal among the high-risk sites.⁸

BSI siteRiskApproximate healing timeParticularities
MTSS (posteromedial tibia)Low (very favourable)4-8 weeksReduced load is usually enough
Fibula / metatarsals 2-3-4Low6-8 weeksConservative, walking allowed
Tibial shaft (posteromedial cortex)Intermediate8-12 weeksOffloading according to Fredericson MRI grade
Anterior tibia (“dreaded black line”)High12-24 weeksRisk of non-union / surgery
Femoral neck, sacrum, pelvisHigh12-24+ weeksStrict offloading; life-threatening orthopaedic risk
Navicular, sesamoidsHigh12-24+ weeksFrequent non-union
Proximal fifth metatarsalHighDelayed return to sportFrequent complications (Triad 2025); specialist opinion

This stratification is crucial because it determines:

  • Imaging: MRI (Fredericson grading, more sensitive than scintigraphy) is the examination of choice to confirm and stratify a suspected BSI.
  • The mode of offloading: walking remains allowed for low-risk BSI; complete offloading is required for high-risk BSI (in particular anterior tibial cortex “dreaded black line”).⁴
  • Referral: any suspected high-risk BSI should lead to a rapid specialist medical consultation.

An international Delphi consensus on BSI (Hoenig 2025, BJSM: 41 members, agreement on 41 statements out of 58) proposes a multifactorial approach to identify and manage them.⁷ The Hoenig 2022 review emphasises that low-grade BSIs can progress to severe grades if neglected, and that management combines activity modification, nutritional optimisation and consideration of risk factors, including RED-S.⁶

MTSS is not a “minor injury” to be dismissed: it is an overload signal to be decoded in its context, including the energetic one, while staying alert to pain that becomes focal.

Critique and controversy: is RED-S over-diagnosed or under-diagnosed?

🤔 The diagnosis of RED-S remains debated. Main criticisms:

  • The precise biological markers of chronic LEA (LH pulsatility, T3, IGF-1) are difficult to obtain routinely; the REDs CAT2 is still recent and needs large-scale external validation studies.²
  • The causal attribution between LEA and an individual BSI remains probabilistic, not deterministic.
  • But underdiagnosis probably predominates: most runners with recurrent BSIs are never assessed for their energy status.⁵

The recommended pragmatic approach: systematic clinical screening in any patient with recurrent or bilateral MTSS, or MTSS occurring in an at-risk athlete (gravity-restricted sport, dietary restriction, amenorrhoea). If in doubt, prompt referral to a sports physician or a multidisciplinary team (doctor, nutritionist, psychologist if relevant).

  • The RED-S (IOC 2023) is a multisystem syndrome linked to insufficient energy availability; it affects men and women and weakens bone.
  • The REDs CAT2 (IOC 2023) classifies risk on four levels (green, yellow, orange, red); the physiotherapist refers.
  • Any recalcitrant, bilateral or recurrent MTSS should lead to RED-S screening.
  • The BSI continuum distinguishes low-risk sites (MTSS, fibula, metatarsals 2-4: conservative management) from high-risk sites (anterior tibia, femoral neck, sacrum, navicular, sesamoids, fifth metatarsal: strict offloading and specialist opinion).
  • Any suspected high-risk BSI requires an MRI and a rapid specialist medical consultation.
Bibliography: Chapter 6
  1. Mountjoy M, Sundgot-Borgen J, Burke L, et al. The IOC consensus statement: beyond the female athlete triad: relative energy deficiency in sport (RED-S). Br J Sports Med. 2014;48(7):491-497. PMID 24620037.
  2. Mountjoy M, Ackerman KE, Bailey DM, et al. 2023 International Olympic Committee's (IOC) consensus statement on Relative Energy Deficiency in Sport (REDs). Br J Sports Med. 2023;57(17):1073-1097. PMID 37752011.
  3. Nattiv A, Loucks AB, Manore MM, et al. American College of Sports Medicine position stand. The female athlete triad. Med Sci Sports Exerc. 2007;39(10):1867-1882. PMID 17909417.
  4. Warden SJ, Davis IS, Fredericson M. Management and prevention of bone stress injuries in long-distance runners. J Orthop Sports Phys Ther. 2014;44(10):749-765. PMID 25103133.
  5. Tenforde AS, Parziale AL, Popp KL, Ackerman KE. Low Bone Mineral Density in Male Athletes Is Associated With Bone Stress Injuries at Anatomic Sites With Greater Trabecular Composition. Am J Sports Med. 2018;46(1):30-36. PMID 28985103.
  6. Hoenig T, Ackerman KE, Beck BR, et al. Bone stress injuries. Nat Rev Dis Primers. 2022;8(1):26. PMID 35484131.
  7. Hoenig T, Hollander K, Popp KL, et al. International Delphi consensus on bone stress injuries in athletes. Br J Sports Med. 2025;59(2):78-90. PMID 39638438.
  8. Williams NI, De Souza MJ, Misra M, et al. 2025 Update to the Female Athlete Triad Coalition Consensus Statement Part 2: Clinical Guidelines for Screening, Diagnosis, Treatment, and Return to Play for Adolescents and Adults. Sports Med. 2026;56(2):375-427. PMID 41474492.
  9. Kraus E, Tenforde AS, Nattiv A, et al. Bone stress injuries in male distance runners: higher modified Female Athlete Triad Cumulative Risk Assessment scores predict increased rates of injury. Br J Sports Med. 2019;53(4):237-242. PMID 30580252.

How do you apply these recommendations concretely in your practice?

In this chapter: red flags specific to the lower limb, criteria for medical referral, validated PROMs for MTSS (MTSS Score Winters 2018, LEFS), barriers and facilitators to evidence-based implementation.

Translating the evidence into daily practice requires clinical skills, interprofessional communication and objective measurement of results. 🧑‍⚕️ This section provides a pragmatic framework.

When, and to which other healthcare professionals, should you refer?

Referral is a key skill of the modern physiotherapist. It rests on identifying situations that exceed their scope of practice or require multidisciplinary management.

To the sports physician or the GP:

  • Presence of a red flag suggesting a stress fracture, a systemic condition or RED-S.
  • Failure of well-conducted conservative treatment over 3 to 6 months, to consider imaging (Fredericson MRI) and a specialist opinion.
  • Any suspected high-risk BSI (anterior tibia, femoral neck, sacrum).

To the sports physician or the sports nutritionist: any patient with RED-S flags (see previous chapter), recurrent MTSS, amenorrhoeic young athlete, weight loss, dietary restriction.

To the podiatrist: for fine biomechanical assessment, prescription of anti-pronation orthoses (recommended for prevention by Marques 2025, moderate certainty).¹

To the psychologist specialising in pain: in the presence of yellow flags (catastrophising, kinesiophobia, performance anxiety) that slow rehabilitation.²

The interprofessional collaboration improves results and the efficiency of the care pathway (Cochrane review Reeves 2017).³ Three keys: clear communication, shared objectives, mutual respect for skills.

How do you measure outcomes and overcome barriers to implementation?

The systematic use of PROMs (Patient-Reported Outcome Measures) is the modern standard for quantifying results. 📈 For MTSS:

  • MTSS Score (Winters 2018, BJSM 52:1108-15): the only MTSS-specific PROM, 15 items measuring pain and limitation (standing, walking, sport).⁴ Reference tool to be used systematically.
  • Lower Extremity Functional Scale (LEFS): generic lower limb tool, validated in French.
  • NPRS (Numerical Pain Rating Scale 0-10): for daily pain (training log).
  • UWRS (University of Wisconsin Running Scale) or VISA-A depending on context (multi-injury runners).

Assessing PROMs at the start, middle and end of treatment objectifies progress, facilitates shared medical decision-making and demonstrates the value of physiotherapy interventions.⁵

Implementing evidence-based practice meets documented barriers: lack of time, lack of critical appraisal skills, access to scientific resources.⁶ Practical solutions:

  • Synthesised resources: clinical practice guidelines, Cochrane reviews, the PEDro database (free, methodological scoring), JOSPT Insights, BJSM/JOSPT podcasts.
  • Journal clubs or monthly reading clubs, with demonstrated effectiveness for EBP culture.
  • PROM scoring apps and digital logbooks for the patient (reduced administrative burden).
  • Mentoring culture among clinicians.

Critique and controversy: from rigid protocol to shared decision-making

🤔 Three tensions persist in applying the evidence:

  • “PROMs paradox”: their usefulness is demonstrated but their implementation remains low (administrative burden, difficulty of interpretation).⁷ The challenge is to turn a numerical score into a relevant clinical decision, without falling into a purely “accounting” approach.
  • “Tyranny of red flags”: their individual predictive value is low and excessive focus can generate unnecessary imaging. It is better to use probabilistic clinical reasoning, integrating the body of clues into the patient’s overall profile.
  • Standardisation vs personalisation: guidelines rest on population averages; the clinician treats unique individuals. The art of EBP is to integrate high-level evidence, clinical expertise and patient preferences.⁵
  • Refer to the doctor if red flag, suspected stress fracture, failure of 3-6 months of conservative treatment or suspected high-risk BSI / RED-S.
  • Systematically use the MTSS Score (Winters 2018) at the start, middle and end of treatment.
  • Supplement with LEFS and NPRS for global and daily monitoring.
  • Overcome EBP barriers: synthesised resources, journal clubs, PROM apps, mentoring.
  • Integrate three ingredients: high-level evidence, clinical expertise, patient values and preferences.
Bibliography: Chapter 7
  1. Marques TBT, Rangel RPS, Martins LV, et al. Preventive interventions for medial tibial stress syndrome: Systematic review and meta-analysis. Gait Posture. 2025;122:92-98. PMID 40633262.
  2. Wertli MM, Rasmussen-Barr E, Held U, et al. Fear-avoidance beliefs-a moderator of treatment efficacy in patients with low back pain: a systematic review. Spine J. 2014;14(11):2658-78. PMID 24614254.
  3. Reeves S, Pelone F, Harrison R, Goldman J, Zwarenstein M. Interprofessional collaboration to improve professional practice and healthcare outcomes. Cochrane Database Syst Rev. 2017;6(6):CD000072. PMID 28639262.
  4. Winters M, Moen MH, Zimmermann WO, et al. The medial tibial stress syndrome score: a new patient-reported outcome measure. Br J Sports Med. 2016;50(19):1192-9. PMID 26511003.
  5. Kyte DG, Calvert MJ, van der Wees PJ, ten Hove R, Tolan S, Hill JC. An introduction to patient-reported outcome measures (PROMs) in physiotherapy. Physiotherapy. 2015;101(2):119-125. PMID 25620440.
  6. Scurlock-Evans L, Upton P, Upton D. Evidence-based practice in physiotherapy: a systematic review of barriers, enablers and interventions. Physiotherapy. 2014;100(3):208-219. PMID 24780633.
  7. Boyce MB, Browne JP, Greenhalgh J. The experiences of professionals with using information from patient-reported outcome measures to improve the quality of healthcare: a systematic review of qualitative research. BMJ Qual Saf. 2014;23(6):508-518. PMID 24505110.

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Anthony Baillon, physiotherapist and co-founder of Physio Learning
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Anthony Baillon

Physiotherapist · co-founder of Physio Learning

Marked for life by his first four-hour lecture without a single image, he took a master’s in instructional design so that it would never happen to anyone again. He hunts down publication bias and unreadable slides with the same intransigence.

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Robin Vervaeke, head of scientific content at Physio Learning✓ Verified

Robin Vervaeke

Scientific lead

Physiotherapist specialising in neuro-musculoskeletal practice and holder of a master’s in public health. He checks the methodological rigour of every article: primary sources, levels of evidence, no exceptions.

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