Originally Posted by ollinger
Let's not forget the erectile dysfunction issue associated with upright bike riding. In his pioneering work about 15 years ago, Dr. Irwin Goldstein at B.U. found a 4 % rate of impotence in bike riders versus 1 % in the control group, a consequence of pressure from the seat that damaged perineal arteries. Other studies since have found higher rates. I'd opt for the recumbent
There are a lot of seats designed not to put pressure on the perineal arteries available these days. Police who patrol on bicycle are often using them. While riders say that it is more difficult to steer a bicycle with these seats versus a traditional seat, that wouldn't be an issue at all with an exercise bicycle.
So it does seem that it would be possible to set up a safe non-recumbent exercise bicycle.