Guess I'll keep this post pretty short. I'm training for a 50 mile event. At about the 25-28 mile mark on a typical trail ride I seem to start feeling some numbness in my feet (similar to having really cold feet). Eventually I get a bit of discomfort in my quads and, if I don't start taking some breaks, I will start cramping to the point of being unable to function.
On the indoor trainer this feeling starts at about the 30 minute mark. My guess is it comes on sooner since I am sitting 100% of the time on the trainer as opposed to quite a bit of out-of-the-saddle riding out on the trail.
Is this a seat issue? Are there any geometry things I can mess with to try to fix the issue? Unfortunately I can't really afford a professional fitting at this point, so I need to do whatever I can to try to remedy the issue myself.