Seems like this is becoming trendy outside of sports pros. Suddenly in the last 1-2 weeks I had 3 different people tell me they are doing cold plunges daily now. I think I recall Huberman talking about it being good for T production, although none of the guys who mentioned their plunges had heard that.
One dude keeps a full size chest freezer filled with water, opens the lid like a hot tub and jumps in.
One dude keeps a full size chest freezer filled with water, opens the lid like a hot tub and jumps in.