Bulletproof Radio

IN THIS EPISODE OF THE HUMAN UPGRADE™…Susanna Soeberg, Ph.D., a Danish researcher, international scientist and expert in cold and heat therapy for health and performance, explains how you can harness the massive benefits of cold water immersion (winter swimming), sauna, breathing, and your metabolism.When it comes to biohacking, a few things rise to the top and make a pretty big difference in your body and brain. Through her research, Susanna discovered the minimum threshold of cold and heat exposure for health benefits. We get right into that on the show. She also works with functional breathing during cold environmental conditions and cold water immersion, especially winter swimming. Have you been considering this biohack for awhile? Baby steps won’t get you there—prepare to go all-in with the cold. “You could take cold showers, for sure,” Susanna says, “but it's not going to activate your parasympathetic nervous system in the same way as submerging yourself into cold water.”Earning a Ph.D. in met