Brian Mackenzie is an innovator in human performance on stress adaptation and a pioneer in the development and application of custom protocols to optimize human health and performance. His work harnesses and integrates respiratory, movement, strength, conditioning and endurance-based training approaches to elicit unprecedented positive results. His protocols have been used to accelerate and raise both mental and physical performance in world-class Olympic and professional athletes, top executives, and elite military operators, as well as to improve the health for people suffering from various chronic and pathological issues.    Time stamps:   0:09:50 Podcast begins 0:10:30 What is the story behind your tattoos? 0:13:50 The breath is the most potent control of our nervous system 0:18:20 What is the point of modifying our breath in the first place? 0:25:00 We are over-breathing! 0:28:10 What is the "bohr effect?" 0:30:55 Other animals will die if they mouth-breath 0:37:30 Working breathing protocols with top-level athletes who are naturally more anxious 0:41:10 What are the 5 "gears" of breathing? And how can we leverage this positively? 0:44:55 Shifting from nasal breathing to mouth breathing shifts what source of fuel our body uses! 0:47:30 We all have a different tolerance of CO2 in our systems 0:55:25 If you blow off too much CO2, you can run into issues 1:00:50 How do we know how much CO2 we can tolerate? 1:04:45 What are some adjustments you will make with high-level athletes? 1:11:15 How can I (as a surfer) improve my breath? 1:17:25 Is there any benefit to nasal-breathing for recovery? 1:23:35 Basic examples of morning breath work 1:28:45 Three steps to getting started with breathwork. And become a member here and use code: FUNDAMENTALHEALTHPOD 1:31:15 What is the most radical thing that Brian has done recently? 1:35:40 What diet does Brian follow? Sponsors   Heart & Soil: www.heartandsoil.co White Oak Pastures: Whiteoakpastures.com, use code: CarnivoreMD for 10% off your first order Belcampo + Heart & Soil Sweepstakes: https://belcampo.com/pages/heart-soil  Belcampo: www.belcampo.com use code: CarnivoreMD for 20% off your order Sacred Hunting: www.sacredhunting.com/Paul for $250 off your hunt The Cold Plunge: TheColdPlunge.com, use code CarnivoreMD for $111 off your cold plunge BluBlox: Blublox.com, use CarnivoreMD for 15% your order