YES, I definitely know what you're talking about, except for the throwing up. I'm an IBS D, and I usually feel fine as long as I'm sitting still, but if I've had something bad to eat, or if I've just had a meal, I nearly always get D a short while after I'm up walking. And sports, I don't even dare try it! I'll try swimming, but then I think I'll have to be on an empty stomach.So, I have no advice, except to do sports on an empty stomach, but that's no good, so I don't really know!Good luck!------------------Tess