Health, Fitness, and Longevity
APR 9, 2026Michael Greger, M.D. FACLM
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Cold exposure activates calorie-burning brown fat
“By activating brown adipose tissue, cold exposure can help us burn more calories.”
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Immersion reduces post-exercise muscle soreness
“Cold-water immersion has been shown to reduce the symptoms of delayed onset muscle soreness.”
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Cold plunges increase white blood cell counts
“Short-term cold water immersion can lead to a significant increase in circulating immune cells.”
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Cold water exposure improves insulin sensitivity
“Cold exposure improves insulin sensitivity, potentially offering metabolic benefits for those with diabetes.”
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Water immersion lowers systemic cortisol levels
“Submerging in cold water can help lower cortisol levels and improve overall mood.”