Endurance athletes may use exogenous testosterone therapy to counteract cortisol-induced reductions in testosterone.

“this is one of the reasons why every once in a while, professional cyclists will get popped for performance-enhancing drugs, meaning they'll get caught, and it's not just that they're increasing red blood cells through EPO and things of that sort, oftentimes they're also taking testosterone not because they want to be large or have massively hypertrophied muscles, but because they're injecting testosterone, they don't have to worry about cortisol-induced reductions in testosterone, and they can just clamp, or keep their testosterone levels high”