Chronic exertional compartment syndrome (CECS) is a condition where exercise causes a build-up of pressure in a muscle compartment of the lower leg, leading to pain and tightness. Symptoms usually come on at a predictable point in exercise and ease when you stop. It is different from acute compartment syndrome, which is a medical emergency.
Also known as CECS, exertional compartment syndrome, chronic compartment syndrome
Symptoms
- Aching, burning or tight pain in the lower leg during exercise
- Symptoms start at a similar time, distance or pace each session
- Pain usually eases within minutes of stopping
- Often affects both legs
- Sometimes numbness, pins and needles or weakness in the foot during exercise
Causes and risk factors
- Repetitive activities such as running, marching or skating
- Being a young, active adult
- A previous lower leg injury
- Running technique, such as heavy heel striking, may play a part in some people
What the evidence says helps
- Recent expert reviews suggest structured rehab with activity changes and gait retraining is increasingly considered a reasonable first step.2
- In one military study, a running and marching gait retraining programme allowed about two-thirds of people to return to duty without surgery.3
- If symptoms persist despite conservative care, surgery to release the compartment (fasciotomy) can be considered. Studies report higher satisfaction after surgery, but evidence quality is low.1
- NHS guidance notes that chronic compartment syndrome often settles by stopping or changing the triggering activity. Surgery is considered if symptoms continue.6
- Diagnosis relies on a careful history and examination, often with pressure testing in a specialist clinic. Other causes of exercise-related leg pain should be ruled out.24
Things you can try at home
- Note when your symptoms start, such as time, distance or pace, to share with your clinician
- Reduce or change the activity that triggers symptoms while you are assessed
- Try low-impact options such as cycling or swimming if they do not bring on symptoms
- Do not push through numbness or weakness during exercise
When to get urgent help
Contact your GP urgently, call NHS 111, or call 999 in an emergency if you have:
- Sudden, severe leg pain after an injury, or pain that does not ease with rest and feels out of proportion: call 999 or go to A&E, as this may be acute compartment syndrome
- Pain with a tense, swollen leg, numbness or difficulty moving the foot after an injury or a tight cast: call 999 or go to A&E
- Ongoing numbness, pins and needles or weakness in the foot: see your GP
- Calf pain with swelling and warm, discoloured skin: get an urgent GP appointment or call NHS 111
- Leg pain that comes on after a short walk and eases quickly with rest, especially in older adults or smokers: see your GP to check circulation
How Apollo can help
We take a detailed history and examine your leg to look at possible causes of exercise-related pain, including shin splints and bone stress injuries. We can assess your running gait and offer a gait retraining and rehab programme. Where CECS is suspected or symptoms persist, we refer you to your GP or a specialist for pressure testing and to discuss surgical options.
No GP referral needed. Clinics in Sheringham, Coltishall and Norwich.
Related reading
Frequently asked questions
What is the difference between chronic and acute compartment syndrome?
Chronic compartment syndrome comes on with exercise and eases with rest. Acute compartment syndrome usually follows an injury and causes severe, worsening pain. Acute compartment syndrome is an emergency: call 999 or go to A&E.
Can chronic compartment syndrome get better without surgery?
Some people improve with activity changes and gait retraining, and this is increasingly tried first. If symptoms continue and limit your activity, surgery may be discussed with a specialist.
How is chronic exertional compartment syndrome diagnosed?
Diagnosis starts with your symptom pattern and an examination. A specialist may measure the pressure in the leg muscles before and after exercise. Scans may be used to rule out other causes such as stress fractures.
References
- Vogels S, et al. (2020). Systematic review of outcome parameters following treatment of chronic exertional compartment syndrome in the lower leg. Scandinavian Journal of Medicine & Science in Sports. View source
- Vogels S, et al. (2026). Diagnostic and therapeutic dilemmas in chronic exertional compartment syndrome. British Medical Bulletin. View source
- Zimmermann WO, et al. (2019). Conservative treatment of anterior chronic exertional compartment syndrome in the military, with a mid-term follow-up. BMJ Open Sport & Exercise Medicine. View source
- de Bruijn JA, et al. (2017). Factors predicting lower leg chronic exertional compartment syndrome in a large population. International Journal of Sports Medicine. View source
- Velasco TO, et al. (2020). Chronic exertional compartment syndrome: a clinical update. Current Sports Medicine Reports. View source
- NHS. Compartment syndrome. NHS website (accessed November 2026). View source
This page is general information, not a diagnosis or a substitute for medical advice. If you are worried about your symptoms, speak to your GP or a registered healthcare professional. Content prepared from the sources above, November 2026.
