There are no well-controlled studies demonstrating the efficacy of deliberate cold exposure to the groin for increasing testosterone levels.

“Likely occurs as a stress compensation.”

“Those are people that are using cold packs on the body and on the groin to try and increase things like testosterone. But as well to try and increase thermogenesis and trying to increase their metabolism.”

“Now as a final topic related to the use of deliberate cold exposure for improving health and performance, I'd like to touch on this theme that exists online, on social media, on YouTube and in various fitness communities of using deliberate cold exposure to the groin, in particular to the testicles, in order to try and increase testosterone.”

“Now, I am not aware of any specific well-controlled studies that show that this indeed works.”

“But I can imagine two reasonably plausible mechanisms by which deliberate cold exposure to the groin, in particular the testicles, would increase testosterone. The first is somewhat direct, which is that anytime you cool a body surface, that if it's cold enough, you're going to get vasoconstriction. And then subsequently you're going to get a rebound increase in vasodilation, meaning you're going to constrict the blood vessels in that area. And then after the cold”