exercise-induced sudden explosive diarrhea

[WarmNPrickly]

What causes exercise-induced sudden explosive diarrhea. This happened to me one time a long time ago so I know exactly what it feels like. Recently this happened to somebody I know so I know I’m not alone. Are we exercising like idiots? What sets it off?

[KarlGauss]

No one knows for sure. The leading theory, I believe, is that since exercise leads to a shift in blood flow to the muscles, there’s less left for the gut. In some people, then, such a relative lack of blood flow to the bowel leads to diarrhea. YMMV.

Here is one (old) reference.

[Shagnasty]

I have gotten that many, many times. I always just thought it was because of some kind of stimulation and physical jiggling in your digestive track. That isn’t too scientific but that was what I always felt.

[GIGObuster]

@Shagnasty

I have gotten that many, many times. I always just thought it was because of some kind of stimulation and physical jiggling in your digestive track. That isn’t too scientific but that was what I always felt.

Not an answer, but all that reminded me that Nicola Tesla reported on the effect extreme vibrations have on the digestive tract, checking if I imagined that…

Ah, here we go:

http://www.intuitor.com/resonance/tesla.html

For entertainment, Tesla once convinced his good friend Mark Twain to test out a vibrating platform in his Manhattan lab. Twain took him up on the offer and found it to his liking. When Tesla commanded Twain to come down off the platform Twain refused because he was having a good time. A few minutes later Twain ran from the device. It seems that Tesla had deliberately neglected to tell Twain that the vibration tended to cause diarrhea.