I know hot baths can decrease sperm cells and fertility , but what about testosterone levels? I am worried it will lower sex drive and devalue my exercising, whereas I was previously hoping it would improve the recovery time for my legs (as I do stair running like a mad man, and hope to do well in some stair climbing races). I am not trying to conceive, so unless it has lasting effects on fertility, this isn t a concern. Thank you for your time and consideration.