Alternating hot and cold showers are an invigorating and extremely beneficial custom to include in your daily routine. A hot shower that lasts less than five minutes has a stimulating effect on the circulatory system. A cold shower that lasts less than one minute will also stimulate blood flow and metabolism, first by constricting and then later dilating blood vessels.
Contrast showers improve the circulation, increase cellular oxidation, stimulate the immune system, strengthen the nervous system, and help direct toxins out of the tissues and organs.
Over time, learn to increase the contrast in temperatures for better effects.
Ending on cold stimulates the body and has an overall warming effect.