Cold Plunging Shows Promise But Lacks Conclusive Scientific Evidence, Studies Say

Cold plunging involves immersing the body in water between 39 to 59 degrees Fahrenheit for health benefits. Gary Brecka, biohacker and founder of The Ultimate Human, recommends two to six minutes for experienced users and under one minute for beginners. “Cold exposure activates your nervous system, improves circulation, and helps your body adapt to stress,” Brecka states. He explains that cold water “boosts levels of norepinephrine, a neurotransmitter that increases your energy level and makes you feel more alert” and triggers “a big, measurable spike in dopamine release.” However, studies from institutions like Harvard Medical School show encouraging but inconclusive results with varying effects. The American Heart Association warns against sudden immersion, noting it can cause “cold water shock” with increased breathing, heart rate, and blood pressure. (Story URL)