EggyBum6969
Retro Guru
mattr":1z83ifle said:Yeah. Lots of things you've been told are rubbish.
9. Testis cancer
Coldman et al., in a case control study, investigated the relationship between the risk of testis cancer and various sports activities among 133 men with testicular seminoma. After controlling for known risk factors such as cryptorchidism and after stratification for age, they found a significant increase in risk of testicular seminoma in men with history of regular bicycling (odds ratio 1.99), horse riding (odds ratio 3.31) or both (odds ratio 4.56). They suggested that persistent repetitive trauma to the scrotal contents, as well as contact exposure to potential dyes and chemicals present in the leather saddles, may be the underlying cause in the development of testicular cancer in riders [53]. The relationship between exercise and the risk of testicular cancer was also addressed by Forman et al., who found that the risk of testicular cancer decreased with increased amount of exercise and increased with increased sedentary [54]. Therefore, although cycling per-se may be associated with increased risk of testicular cancer in a direct mechanism, the protective effect of exercise against testicular cancer may reduce this risk or cancel it completely [30].