Perineal and penile numbness is a frequent complaint of avid male bicyclist
s. It is currently believed to be caused by cycling induced transient ische
mia from pressure on perineal neurovasculature while riding, which results
in temporary numbness. We report electromyographic evidence of bilateral pu
dendal nerve injury associated with excessive bicycling. This condition may
be associated with male erectile dysfunction if the penile blood supply is
compromised.