Mind Pump is made up of Adam Schafer, Sal Di Stefano, and Justin Andrews. They're a group of former personal trainers who host The Mind Pump Podcast.

Ben Greenfield is a fitness and health blogger.

Josh Bridges is a 4x CrossFit Games veteran, and a former Navy SEAL. He took second overall at the 2011 CrossFit Games.

Layne Norton is a professional bodybuilder, powerlifter, and a doctor of nutritional science.

Rhonda speaks with Dr. Pierre Capel, professor of experimental immunology who has studied Wim Hof to bring the science to explain his incredible ability to withstand cold and summon his immune system at well. Through this insightful discussion they also cover how the immune system is impacted by stress/meditation and just how dynamic our DNA