Deliberate cold exposure is a potent method for increasing catecholamines, thereby improving mood, mental acuity, and alertness.

“Deliberate cold exposure, it turns out, is a very potent way to increase these catecholamines, this category of chemicals and thereby to improve mood, mental acuity and levels of alertness.”

“And if you do what I described, such as getting morning sunlight and ideally, you'd get a little bit of deliberate cold water exposure, by the way, to boost adrenaline and norepinephrine and dopamine, those catecholamines early in the day. So quick one-minute cold shower, even or a three-minute cold shower, or if you have access to an ice bath early in the day, plus some sunlight, doesn't matter which one you do first, doing that early in the day is really going to create that peak of cortisol, dopamine, epinephrine early in the day.”

“if you the more adrenaline nor epinephrine nor adrenaline and dopamine that you experience early in the day as well as cortisol from bright light exercise caffeine and cold the better you're going to sleep at night it also sets your circadian rhythm”