Quick Summary

• CECS usually causes symptoms that start at a predictable time during exercise and settle with rest.
• Acute compartment syndrome can follow trauma and may worsen rapidly. It is a medical emergency.
• Physiotherapy can help with load management, biomechanics, and rehabilitation. Some cases need specialist review.

What Is Compartment Syndrome?

Your lower leg contains muscle “compartments” surrounded by fascia. Fascia is firm connective tissue that helps muscles transmit force. During exercise, muscles swell and blood flow increases. In most people, pressure drops quickly once exercise stops.

In compartment syndrome, the pressure inside a compartment rises too much or stays high for too long. That pressure can reduce blood flow and irritate nerves. As a result, you may feel pain, tightness, cramping, or burning, and you may lose strength or control in the foot and ankle.

Chronic Exertional vs Acute Compartment Syndrome

Chronic Exertional Compartment Syndrome (CECS)

CECS is commonly exercise-related. Symptoms often begin at a consistent time or distance (for example, 8 minutes into each run). Pain usually settles within minutes of stopping. After rest, you can often restart activity, yet the same pattern returns.

Acute Compartment Syndrome

Acute compartment syndrome can occur after a fracture, crush injury, severe bruise, or tight cast/bandage. Pain can feel intense and may not match the visible injury. Symptoms can progress quickly. If this is suspected, urgent medical assessment matters.

Urgent Red Flags

Seek urgent medical care now if you have rapidly worsening lower leg pain, severe pain with passive movement, increasing numbness, marked weakness, a very tense/swollen lower leg, or symptoms after trauma or a new cast/bandage.

What Causes Chronic Exertional Compartment Syndrome?

CECS is usually linked to how pressure changes inside the compartment during exercise. Several factors may contribute:

• Fascia that is less flexible or thicker than average
• Anatomical variation, including an extra compartment in some people
• Rapid training increases, speed sessions, hills, or sudden changes in volume
• Biomechanical factors, including foot and ankle mechanics, stride changes, or calf overload

Sometimes, CECS appears alongside other running-related conditions. Therefore, a full assessment should also consider tendon overload and bony stress, particularly if pain is focal or persists after rest.

Common Symptoms

CECS symptoms often include:

• Tightness, pressure, cramping, or burning in the shin or calf during exercise
• Predictable onset at a set time/distance or intensity
• Relief with rest, often within minutes
• Symptoms in both legs (common, but not always)
• Numbness or tingling in the foot (depends on the compartment and nerve involved)
• Foot fatigue or reduced ankle control during the flare (less common)

How Physiotherapists Assess Compartment Syndrome

A physiotherapist will take a detailed history and look for patterns. Next, they will assess your lower limb strength, joint range, calf capacity, neural sensitivity, foot and ankle control, and running or training loads. They may also check your footwear and the surfaces you train on.

Because several conditions can mimic CECS, your physio will screen for differentials such as stress fracture, medial tibial stress syndrome, tendon overload, nerve entrapment, and vascular causes of exercise-induced leg pain.

How Doctors Diagnose CECS

CECS is often suspected clinically, then confirmed with testing where needed. A common medical test uses a needle-based device to measure compartment pressure before and after exercise. Some clinics also use imaging or other tools to help guide the diagnosis.

For a plain-language overview, see: MedlinePlus – Compartment Syndrome.

Compartment Syndrome Treatment

What Physiotherapy Can Help With

Physiotherapy aims to reduce symptoms, improve load tolerance, and address contributing factors. It also helps you decide when further medical review makes sense.

Phase 1 – Settle Symptoms and Reduce Irritation

• Adjust training load (volume, speed, hills, surfaces, recovery)
• Short-term symptom relief strategies as appropriate
• Footwear review and basic technique cues

Phase 2 – Restore Mobility and Capacity

• Ankle and calf mobility where needed
• Calf and lower limb strength progression
• Neural mobility work if relevant

Phase 3 – Improve Control and Running Tolerance

• Gradual return-to-run planning
• Strength and power progressions
• Load monitoring to avoid repeated flare-ups

PhysioWorks has a “Foot Stability Program” that may suit some people working on lower limb control and load tolerance.

When Surgery Enters the Conversation

For CECS, a surgeon may discuss fasciotomy (fascia release) if symptoms persist despite a well-structured rehabilitation plan and you want to keep training. Your physio can help you prepare for that discussion and guide return-to-activity planning if surgery goes ahead.

What Results Can You Expect?

Some people improve with better load management, strength progressions, and biomechanics work. Others continue to flare due to anatomy and pressure changes that do not settle with conservative care. If progress stalls, a referral to a sports doctor or orthopaedic surgeon may be appropriate.

What To Do Next

If your shin or calf symptoms start at a predictable point during exercise and settle with rest, book a physiotherapy assessment. Bring your recent training history (weekly kilometres, surfaces, hills, and speed sessions). That information makes the plan more accurate.

References

1. Dean RS, et al. Chronic exertional compartment syndrome is frequently diagnosed through static compartment pressure measurements and managed with fasciotomy: A systematic review. J ISAKOS. 2024.
2. Vogels S, et al. Clinical consensus on diagnosis and treatment of patients with chronic exertional compartment syndrome of the leg: A Delphi analysis. 2022.
3. Malik GR, et al. The pressure is rising: Evaluation and treatment of chronic exertional compartment syndrome. Curr Sports Med Rep. 2023.
4. Torlincasi AM, et al. Acute Compartment Syndrome. StatPearls [Internet]. Updated 2023.
5. American Academy of Orthopaedic Surgeons. Management of Acute Compartment Syndrome: Clinical Practice Guideline. 2025.