Lower cortisol levelsĬortisol is the “fight-or-flight” hormone that the body releases in response to stress. This improves circulation in the deeper tissues. In fact, one small 2019 study found that taking a cold shower after exercise may improve general hydration by cooling down the body.Īs blood travels away from the skin, blood vessels in deeper body tissues dilate. This diverts blood flow away from the surface of the skin. Some beneficial effects of cold water immersion include: Improved circulationĮxposure to cold water causes the blood vessels on the surface of the skin to constrict.
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