Diarrhea is generally defined as an increase in the frequency and liquidity of bowel movements. Diarrhea can vary from semisolid to watery and can be classified as acute if its duration is less than 4 weeks and chronic if it is greater than 4 weeks. Diarrhea and related symptoms such as abdominal cramping and an increased urge to defecate with high-intensity exercise are fairly common; in up to 50% of athletes, these symptoms will occur at least occasionally.

Acute Diarrhea

In healthy athletes, most cases of acute diarrhea are infectious in origin, including ...

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