Chronic exertional compartment syndrome
Chronic exertional compartment syndrome
Chronic exertional compartment syndrome is an uncommon, exercise-induced neuromuscular condition that causes pain, swelling and sometimes even disability in affected muscles of your legs or arms.
Anyone can develop chronic exertional compartment syndrome, but it's more common in athletes who participate in sports that involve repetitive movements, such as running, fast walking, biking and swimming. Chronic exertional compartment syndrome is sometimes called chronic compartment syndrome or exercise-induced compartment syndrome.
Conservative treatments typically don't help with chronic exertional compartment syndrome. However, surgery is usually successful, allowing you — whether you're a recreational or serious athlete — to return to your sport.
The pain and other symptoms associated with chronic exertional compartment syndrome may be characterized by:
Pain due to chronic exertional compartment syndrome typically follows this pattern:
Taking a complete break from exercise may relieve your symptoms, but usually only temporarily. Once you take up running again, for instance, those familiar symptoms usually come back.
When to see a doctor
Sometimes chronic exertional compartment syndrome is mistaken for shin splints. If you think you have shin splints but they don't get better with self-care, talk to your doctor.
Your arms and legs have several groupings, or compartments, of muscles, blood vessels and nerves. Each of these compartments is encased by a thick layer of connective tissue called fascia (FASH-ee-uh), which supports the compartments and holds the tissues within each compartment in place. The fascia is inelastic, which means it has little ability to stretch.
In chronic exertional compartment syndrome, exercise or even repetitive muscle contraction causes the tissue pressure within a compartment to increase to an abnormally high level. But because the fascia can't stretch, the tissues in that compartment aren't able to expand sufficiently under the increased pressure. Imagine shaking up a soda bottle but leaving the cap on — an enormous amount of pressure builds up.
As the pressure builds up within one of your muscle compartments, with no outlet for release, nerves and blood vessels are compressed. Blood flow may then decrease, causing tissues to get inadequate amounts of oxygen-rich blood, a condition known as ischemia (is-KE-me-uh). Nerves and muscles may sustain damage.
Experts aren't sure why exercise or muscle contraction creates this excessive pressure in some people, leading to chronic exertional compartment syndrome. Some experts suggest that biomechanics — how you move, such as landing styles when you jog — may have a role. Other causes may include having enlarged muscles, an especially thick or inelastic fascia, or high pressure within your veins (venous hypertension).
Chronic exertional compartment syndrome
Chronic exertional compartment syndrome is a musculoskeletal condition brought on by exercise. It can affect muscle compartments in any of your limbs but occurs most commonly in the lower legs. The ...
The condition is most common in athletes under 40, although people of any age can develop chronic exertional compartment syndrome.
People most at risk of developing chronic exertional compartment syndrome are those who engage in exercise that involves repetitive motions or activity. Young female athletes may be at particular risk, for reasons unknown.
Risk factors include engaging in such sports, exercises and activities as:
Overuse of your muscles or overtraining — that is, working out too intensely or too frequently — also can raise your risk of chronic exertional compartment syndrome.
Chronic exertional compartment syndrome isn't a life-threatening condition and usually doesn't cause any lasting or permanent damage if you seek appropriate treatment. However, if you continue to exercise despite pain, the repeated increases in compartment pressure can lead to muscle, nerve and blood vessel damage. As a result, you may develop permanent numbness or weakness in affected muscles.
Perhaps the biggest complication of untreated chronic exertional compartment syndrome is its impact on participation in your favorite sports — the pain may prevent you from being active.
Preparing for your appointment
You're likely to start by first seeing your family doctor or a general practitioner. He or she may refer you to a doctor who specializes in sports medicine or orthopedic surgery.
Because appointments can be brief, and because there's often a lot of ground to cover, it's a good idea to be well prepared for your appointment. Here's some information to help you get ready for your appointment, and what to expect from your doctor.
What you can do
Your time with your doctor is limited, so preparing a list of questions will help you make the most of your time together. List your questions from most important to least important in case time runs out. For chronic exertional compartment syndrome, some basic questions to ask your doctor include:
In addition to the questions that you've prepared to ask your doctor, don't hesitate to ask questions anytime you don't understand something.
What to expect from your doctor
What you can do in the meantime
Tests and diagnosis
Pain is common in athletes of all levels. It can have many causes, which can make diagnosis challenging. In fact, for many people with chronic exertional compartment syndrome, establishing the diagnosis may take many weeks to months.
Because other exercise-related problems are more common than chronic exertional compartment syndrome, your doctor may first try to determine if you have shin splints or stress fractures, for instance. As the more common problems are ruled out, your doctor will begin to focus on the less common potential causes, along with more specialized testing.
Medical history and physical exam
Your doctor will also examine the areas where you experience pain, such as your arms or legs. Sometimes your doctor may notice a muscle bulge, or herniation, if you have chronic exertional compartment syndrome. Less commonly, your doctor may discover areas of swelling or tightness around a muscle. But one problem that makes diagnosing chronic exertional compartment syndrome challenging is that the physical exam is usually completely normal.
In addition, some medical centers are researching the use of a specialized magnetic resonance imaging (MRI) test to detect chronic exertional compartment syndrome. While you're lying down in the MRI machine, you contract muscles to bring on your symptoms. The MRI can detect changes that are characteristic of chronic exertional compartment syndrome, which can be helpful in making the diagnosis. But further evaluation to measure your compartment pressures is still necessary to provide a definitive diagnosis and to determine if you would benefit from surgery.
Compartment pressure testing
This test, often called compartment pressure measurement, is the gold standard for diagnosing chronic exertional compartment syndrome. Because it's an invasive test, involving insertion of needles into your muscles, and can be mildly painful, compartment pressure measurement usually isn't performed unless your medical history and other tests strongly suggest you may have this condition.
Testing for chronic exertional compartment syndrome
The best way to diagnose chronic exertional compartment syndrome is by measuring the pressure within muscle compartments. Here, a hand-held portable needle device is inserted into the muscles of the ...
Treatments and drugs
Options to treat chronic exertional compartment syndrome include both conservative and surgical methods. However, conservative measures have proved to be much less effective.
You can also consider switching to a different sport. For instance, if your symptoms are related to jogging, try biking instead.
Although surgery is highly effective for most people, it's not without risk. Complications of the surgery can include infection, permanent nerve damage, numbness and scarring. In addition, since your muscles will no longer be encased by fascia, they may bulge out during exercise, creating a cosmetic concern.
There also are different ways to perform each type of surgery. For instance, surgery that involves smaller incisions may leave smaller scars but could make it more difficult for your surgeon to navigate through the internal tissues — muscles, nerves and blood vessels — leading to a higher risk of complications. In addition, some surgeons prefer making just one incision, while others prefer two.
Be sure to talk to your doctor about the method that's best for you and about how long you will need to wait before returning to exercise and activity. Be sure to follow post-surgical instructions your doctor will give you to ensure a smooth return to your sport.
Surgery for chronic exertional compartment syndrome
Surgical treatment of chronic exertional compartment syndrome involves operating on the fascia. Shown here is the left leg a day after a fasciotomy, with the skin sewn up with a single running stitch....
There aren't any self-care measures that will specifically help prevent or treat chronic exertional compartment syndrome. But following basic sports and fitness guidelines can help protect your health and safety during exercise:
Last Updated: 2010-08-12
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