Running & Irritable Bowel Syndrome

Runners can be especially prone to irritable bowel syndrome.

Irritable bowel syndrome, or IBS, is a painful condition that affects the large intestine and can be especially pronounced among runners. Running places a certain amount of stress on the bowels and in some cases can reveal underlying symptoms caused by IBS. Fortunately, runners can use a number of preventative measures to keep IBS at bay while pounding the pavement on a regular basis.



The effect of IBS on the large intestine can produce a number of symptoms, including cramping, abdominal pain, constipation diarrhea, and bloating gas. IBS does not permanently impair the intestine like other diseases such as Crohn's or ulcerative colitis. The condition is limited to its basic symptoms and does not lead to inflammation or changes in bowel tissue.


Video of the Day


While running can help produce regular bowel movements and contribute to lower risks of colon cancer, it can also unmask IBS. IBS is not caused by running, but a pre-existing condition can be revealed. IBS and its accompanying symptoms typically occur during or after running. Up to half of all runners experience general abdominal discomfort, including IBS. The up-and-down motion of running naturally stirs the bowels, while blood flow during running is diverted from the intestines to the legs, thereby opening the possibility of cramping or diarrhea.


Dietary Help

Avoiding certain kinds of food is important to people with IBS. For runners, choosing other kinds of food is just as critical. Most runners agree that loading up on carbohydrates can provide the energy needed to complete a run. High-carb foods such as rice, pasta, oatmeal, potatoes and white bread contain high soluble fiber content that is easy on the intestines. Caffeine, dairy products, and high-fiber foods can enhance IBS and should be avoided by people with frequent IBS.


Medicinal Treatment

While there is no cure for IBS, runners can learn to minimize the symptoms with certain types of medicine. Fiber supplements or laxatives have been found to help those who particularly experience constipation. Many over-the-counter medications can alleviate diarrhea. Antispasmodics are commonly prescribed for dealing with colon muscle spasms and abdominal pain. It is important to carefully consider a medication, since a product prescribed to treat one symptom can actually spur a different one.



Runners who have IBS can try a number of preventative measures to make the experience of running a pain-free, pleasurable one. Avoiding food at least two hours before running will help minimize the risk of a full stomach triggering the condition during a run. Staying well-hydrated by drinking plenty of fluids before and after running is an effective approach to staving off symptoms. Run routes that include close proximity to public restrooms in case of emergency; for races or special events that do not include toilets, taking a pre-run antidiarrhea medication can be helpful as well.




Is this an emergency? If you are experiencing serious medical symptoms, please see the National Library of Medicine’s list of signs you need emergency medical attention or call 911.

Report an Issue

screenshot of the current page

Screenshot loading...