Two of my sisters who run marathons and are constantly training have run into these issues as well. I've heard stories they've told of super long distance runners eating pizza's and what not while they run. Try some power bars and things like that during a run. Don't eat huge meals, just small ones constantly so you body can keep on an even keel so to speak and produce constant energy. And of course, keep hydrated. It's tougher to keep hydrated and cooler and cold days, so make sure to force yourself to drink.
GI and stomach problems are very common for long distance runners, theories vary as to why. Different techniques work for different people, and sometimes it's just something you'll have to always deal with. Try emptying your bowels as much as possible before a run and taking some Imodium AD or Pepto. You will probably need to experiment with different things to try and find something that helps.
A Google search can give you a lot of useful information on this. As i said it's very common, so don't quit
GI and stomach problems are very common for long distance runners, theories vary as to why. Different techniques work for different people, and sometimes it's just something you'll have to always deal with. Try emptying your bowels as much as possible before a run and taking some Imodium AD or Pepto. You will probably need to experiment with different things to try and find something that helps.
A Google search can give you a lot of useful information on this. As i said it's very common, so don't quit
