Little Sal wrote:
How much you wanna bet that Sal's recently-revealed gonadism is the result of years of steroid abuse and/or testosterone doping?
If hard training and racing alone could lead to hypogonadism in even 10 percent of elite distance runners, this condition would be endemic among people Salazar's age. In his letter, he claims that his training zapped his endocrine system, but he doesn't support this with another "Exhibit," he merely expects readers to accept this explanation at face value.
Try finding something on PubMed along these lines. I doubt it's there.