One of the things I've had to do when I'm running in the mornings is to teach myself to go to the bathroom first thing, otherwise I'll get up, get ready, get moving, and then... have to go. UGH. I try to keep a schedule and if I'm good about it, my body can be ready. Sometimes just activating my metabolism activates my entiiiiiiiiiiire body process. ARR.

Good luck. Let us know what works for you, maybe it'll help the rest of us.