Cold Water Immersion

The Minimum threshold for cold water immersion was 11 minutes and 57 minutes of sauna per week divided in 2-3 sessions each led to significant health benefits. Ideally, you would want to alternate between cold immersion and sauna treatment. Noradrenaline and Dopamine increased 2.5x within minutes and lasted for hours. This increased focus, mood and brown fat activation. As one would expect, people became more adapt to the cold and hot environments. The improved brown fat activation led to a lower production of insulin and faster glucose metabolism. The cold adapted people essentially had more brown fat activation and were warmer and had improved basal metabolic rates than non-cold adapted people.

Soberg, S. Cell Reports Medicine. 2021. Altered brown fat thermoregulation and enhanced cold-induced thermogenesis in young, healthy, winter-swimming men. 100408.