Upon first contact with cold water, your body’s immediate reaction is an involuntary, loud inhalation and a possible urge to yell. This response is due to a rapid increase in norepinephrine, up to 2.5 times normal levels, stimulating your sympathetic nerves. This triggers the fight or flight response, a primal reaction to perceived threats.

Consistent cold showers over a two-week period can lead to significant psychological changes. The cold water stimulates the vagus nerve, enhancing serotonin secretion in the brain. This results in a more peaceful inner state. Zusätzlich, increased levels of adrenaline and oxytocin improve focus and emotional pleasure,