A member asked:

Can intense exercise mess up your digestive system?

A doctor has provided 1 answer

Depends: Depends on what you mean by "mess up". Intense exercise causes more blood flow to be routed to your muscles and away from less useful organs at that time such as your digestive system. As a result some people will get diarrhea that can sometimes contain blood if the lack of blood flow is severe enough. This is one of the theories regarding "runners trots".

Answered 8/31/2013

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