I really can stand longer than I indicated here. I've done entire climbs out of the saddle, but hated most every second of it! I have gotten close to total muscular collapse, too. I have done hill repeats to work on strength, and I've climbed some short grades that were so steep if I stopped I'd fall - and there was no way to turn around. Stupid? Me? Well, yeah...

I am amazed how the pros do it. They also are so graceful in the way they literally "dance on the pedals" and move that bike around. It's pure ballet, and marvelous to watch. I just wish I could do it!