Cold water bathing has diverse benefits. Physically, it improves heart function as it makes blood vessels constrict and dilate. It also boosts the immune system by increasing the activity of white blood cells and interferon production. Moreover, it enhances blood circulation, improves respiratory function through deeper and faster breathing, and speeds up metabolism. Psychologically, it helps improve stress - coping ability as overcoming the fear of cold water gives a sense of accomplishment. It also strengthens willpower and enhances mood by stimulating endorphin release.