In this episode, I talk about the Physiologic Flexibility Certification open from April 20 to April 27 and where to get all the details. At the core is physiologic flexibility, which is your body’s ability to adapt, perform, and recover across different stressors, not just optimize one thing. I break down the four key systems that drive this: temperature, pH, fuels (carbs, fat, lactate, ketones), and breathing (O₂/CO₂), and how they all work together. We also get into why AI can miss the physiology, how a 30-second Wingate hits all four pillars, and how to apply this to real-world training with 40+ practical takeaways. Episode Sponsor: Physiologic Flexibility Certification: https://physiologic.miketnelson.com/sales Available now: Grab a copy of the Triphasic Training II book I co-wrote with Cal Deitz here. Episode Chapters: 00:19 Cert Enrollment Details 01:36 AI Pitfalls and Cold Plunge Example 04:05 Four Pillars Overview 05:26 Breathing Module Deep Dive 06:39 Homeostasis and Why It Matters 07:39 Basics First Then Add Stressors 08:51 Wingate Example All Systems Overlap 12:05 Time Efficient Programming 13:37 How to Join and Bonuses 14:48 Coach as Translator and Course Structure 16:22 Wrap Up and Medical Disclaimer Get In Touch with Dr Mike: Instagram: https://www.instagram.com/drmiketnelson/ YouTube: https://www.youtube.com/@flexdietcert Email: Miketnelson.com/contact-us