I can appreciate your perspective, but there was a different reason I gave in my OP, the arm fatigue issue was an aside. I want to be more vertical, at least I want to try it and see how it feels. I've noticed every time I'm trying to put the power down, aside from just standing up and mashing, that I scooch forward, but it doesn't take long before I end up sliding back. So I end up with this tiring routine of scooch forward, slide back, scooch forward, slide back....