Andrew Huberman
describes a simple cold exposure protocol that involves ending each morning shower with a blast of cold water. This shift from warm to cold water, which was initially painful but became tolerable over time, significantly boosts alertness and has become a positive part of his routine
1. Additionally, for more structured protocols related to fat loss and other health benefits, he mentions a free resource available at The Cold Plunge website. These protocols focus on the shivering response induced by alternating between cold and slightly warmer environments
2.