Hey docs,
is there any evidence showing an increase risk of testicular cancer in avid cyclists?
Any evidence? Yes, but how good is it and what does it mean practically speaking?
In terms of cycling, Coldman et al. [6] reported that cyclists who regularly cycled during their lifetime had almost twice the odds of developing TC than non-cyclists (age-adjusted OR: 1.98, p = 0.06) – although this observation was based on 44 cases and 28 controls. Two much larger studies [20, 22] reported no association between cycling as a teenager or throughout lifetime and risk of TC: for example, in a study of n = 391 cases and n = 1023 controls, Littman et al. [22] observed that those who cycled regularly during grades 7–12 were no more likely to develop TC than those who did not (adjusted OR 1.00, 95% CI 0.70–1.30).