Beyond the Basics with Physiologic Flexibility: Certification Course is Now Open

In this episode of the Flex Diet Podcast, I break down why I built the Physiologic Flexibility Certification (PhysFlex) as a “level two” continuation after you’ve already got the basics of nutrition, training, and recovery mostly dialed in. I explain how Phys Flex targets four overlapping homeostatic regulators—temperature (heat/cold exposure), pH (acidity/alkalinity shifts), expanded fuels (ketones and lactate), and oxygen/CO2 regulation (breathing)—and why taking a systems view matters more than treating everything in silos. I share examples of how these pillars can become the real limiter in recovery and performance, including high-intensity work, long-duration events, and signs like elevated overnight respiration rate. Enrollment is open from Monday, October 12 through midnight PST Monday, October 19, 2026, and I’m offering direct email access for questions. Enroll here: https://physiologic.miketnelson.com/sales Episode Timestamps: 00:00 Welcome and Podcast Focus 00:19 Course Enrollment Window 01:44 Who This Certification Is For 02:48 Why Four Pillars Together 03:41 The Four Homeostatic Pillars 05:05 Systems Thinking Over Silos 08:07 Applying the Framework to Recovery 11:41 Course Structure and Interventions 13:09 Support, Email Access, Next Guest 13:58 Medical Disclaimer and Closing Get the Daily Fitness Insider newsletter (free): https://www.miketnelson.com/newsletter