Stomach pain and diarrhea after walking

I just went for a 45 minute walk, i walk fairly fast, but didnt go over board, about 35 minutes in my stomach starts to hurt, when i get back home i have bad diarrhea and the stomach pains didnt go away for 30 minutes. I think i eat pretty well. Im unsure what could be happening?

[Dr Arora]

Hi, there is no association between going for a walk and diarrhea. In your case, this might be purely co-incidental. The cause of diarrhoea might be some infection or a chronic malabsorption problem. It could also simply be due to change in meals. Get proper hydration and wait for the diarrhoea to be over and start walking again which is very helpful for general health. Regards.

[swiftness]

Really is that so? http://walking.about.com/cs/med/a/sensstools.htm