Andrew Huberman - What It’s Like Studying David Goggins

Cold water creates an adrenaline release in your body.

If you take cold showers on a regular basis, you get used to having high levels of adrenaline in your body. This enables you to relax and think clearly in stressful situations, where the body responds by releasing adrenaline, such as: car traffic problems, intense arguments with other people, or doing things outside of your comfort zone.