Short distances on a bicycle are actually healthier than longer distances. Long distance cyclists tend to have issues with losing bone and muscle density.
Speaking as a sometime ultra endurance participant I have to say this is misleading. Bone density loss only significantly affects those who practically live on their bikes, such as professional road racers. And even then it is easily attenuated by visiting the gym.
One that fits your butt. Basically you want to have your weight on the sit bones, not the tissue in between. Seats come in different widths and shapes to accommodate different shaped butts.
Custom ones can be made after they scan your pelvic region. Essentially, there's a depressed, or cutout section in the middle with two pads in parallel which should support your bones as the other poster mentioned.
i don't know, i know i have a bad one, as after 15+ mins of cycling, when i get off the bicycle... can't describe it differently.. my balls sleep... and i can describe that that is not a pleasant feeling. e.g. 10 fold worse then a sleeping foot or leg.
