Cold Plunge Temperature Guide: What the Science Actually Says (2026)
The research-backed sweet spot for cold plunging is 50°F to 59°F (10°C to 15°C). Water at 57°F triggers a 530% norepinephrine increase. Water at 68°F does not. Temperature is the single variable that determines whether you get a physiological response or just a cold shower. This guide breaks down what happens at each range, what … Read more