I had a well-conditioned rear end before I tried the E3. I rode it for about 40 miles, as I recall, and it took me 3 long months to get over a saddle sore from that one ride. My belief is that the only support you have is your two sit bones on a little piece of something and it wore me out quick. Everybody to their own but the E3 was certainly not for me. One of the biggest mistakes I have ever made in cycling. Kindly - Don