Ummm, nope. I've heard the term before but never been inflicted with it I guess. My Corbin seat worked wonderfully and my butt was one of the few areas of my body that wasn't sore! Actually, I fared pretty well - took some ibuprofren each morning to stave off muscle aches. I've been sore all over the last couple days but that's to be expected. My shoulders were hurting a bit towards the end of the trip but that was more from sleeping on them (remember - 3 shoulder surgeries in the last 2 1/2 years, last one was in december) on the ground (no room for an air mattress) than it was from the riding.