Posted: 10/06/2013 at 18:29
I would recommend keeping a close eye on what you are eating and seeing whether there is any correlation with it and your need to poo.
I mostly eat plants in some form or other so my digestive tract is pretty swift. Generally, once I'm up and about and have had my two morning craps (no idea why, 10 minutes apart, first one is like a warm up and the second is the main event!) that's it for the day.
Unless....I've had something with lentils in for lunch. In which case, walking to the train 5 hours later can be risky, let alone running
Another running friend of mine has the same issue, except with apples. He's fine, unless he has eaten an apple in the 4 - 6 hours beforehand in which case it's "bush time"....really odd.
Something else that might help is having a strong coffee an hour before you run. That can stimulate things and enable you to have a clearout before you go.
What a great topic!