Originally Posted by zonatandem

At age 81 I still pedal 5,000 miles a year and have cycled over 300,000 miles (240,000 of them on tandem with my wife).
In my opinion cycling did not affect my prostate, but probably 'old age' was the culprit for my cancer episode.
Had seed implants about 10 years ago and am doing great!
Have always ridden hard saddles and correct fit/positioning on a bike/tandem is crucial.