I still have the 20/20 show with Goldstein on it and the whole thing is a crock. They used the pelvis of a female to demonstrate a male problem. Sure enough, when the pelvis was placed on the saddle, it looked like the nerves and blood vessels would be impinged. Only thing is, a woman has a slightly different anatomy than a man. (Something I'm sure most women are truly grateful for.)

So I emailed ABC and told them what I thought and that they were wrong about this. They gave me a polite form letter and then a few months later they ran a show that provided the other (correct) view on the subject.

If you do experience numbness, don't ignore it. The first thing you should check is the bike fit, riding on a frame that is too big can create real problems in this and other ways.