Matthew Schmidt bought his first mountain bike 10 years ago, and from the onset his recreational rides in the idyllic Mount Tamalpais area of California’s Marin County left him numb in his personal undercarriage, where the crotch meets the bicycle saddle. Schmidt, 42, of San Rafael, Calif., dismissed the discomfort as the price to pay for vigorous riding on rough terrain. But by the end of 2002, the perineal pain and sexual problems he had experienced for years became intense. He stopped riding and, desperate for answers, saw several urologists before the last finally diagnosed pudendal-nerve damage, caused by his leaning into the protruding nose of his bicycle seat.
Given the attention that Lance Armstrong has brought to bicycle riding and its positive reputation as a good cardio workout, it’s no surprise that the sport is high on the list of today’s exercise options. But health experts say anyone considering this fitness and recreational pursuit needs to be aware that the way most bike seats are built can put harmful pressure on sensitive parts of the body.