Quote Originally Posted by KnottedYet
. . . . (irritated by the staying in one position while on a trainer, while in the real world you do shift around a good bit).
I really have no clue but Knotted is right on target with the one position thing. What is your workout on the trainer? Trainers can be brutal at the best of times but if you're just sitting for the whole session. I like doing a lot of standing intervals so I don't put pressure on the same contact patches for the entire time.

If you have other workouts that are "far more cardiovascularlly challenging than riding on the trainer" you need to get Spinervals and let Coach Troy yell at you. That will keep you from sitting in one spot.