Originally Posted by
timtak
I did not understand the part where he said that it takes weight off the sit bones, and sitting on ones glutes until recently. I thought it was a crazy idea, but I now feel it is great.
I learned to sit on my glutes on very long, >5 hr long rides up in the mountains.
However, I can only do it when sitting relatively upright on my road bike even if my saddle is already tilted down. In less aero position which isn't a big deal on long and slow climbs. I will also do it in the flats if I'm trying to relax but will have to arch my back (convex) a bit more to get a bit more aero.
One "problem" of sitting on glutes is you will rock a bit. One might say it's inefficient. Ironically, I felt the opposite way and I feel less tired at the end of a 6 hr ride when I did so. So rocking isn't a problem at all.