The fact that hot tubs reduce sperm production and motility is well known. If fact, I read recently that a single trip to the hot tub can seriously reduce fertility for up to six months. What I haven't been able to find out in my research is whether or not hot tubs affect testosterone production. I can't imagine frying my testes in a hot tub would do any good in this regard but I'm wondering if it can have a similar effect on testosterone production as it does on sperm production. Reduced test levels for weeks or even months after only 20 minutes in a hot tub would really suck. Does anyone have any information on this? I enjoy the occassional hot tub