what about yours makes it so uncomfortable? is it something inherent to you, or that bike? if the latter, maybe trading the bike in for a more comfy one would help. i know i am just too damn lazy/wimpy to bother with things that make me seriously uncomfortable. that's why "comfort" was a major consideration for buying this thing.

after 30 min on it my butt falls asleep. i guess that'll be a natural limit to the workout length.