
Flex Diet Podcast Episode 348: Training Physiologic Flexibility with Dr. Mikki Williden
Oct 16, 2025
01:19:27
In this episode, I’m sharing a special rebroadcast of my chat with Dr. Mikki Williden all about physiologic flexibility, including how to train your body to handle stress and adapt better. We cover metabolic flexibility, heat and cold exposure, sauna and cold therapy, lactate and buffering systems, plus CO₂ and O₂ tolerance. You’ll learn how these systems connect to boost performance, recovery, and body composition in a healthy, sustainable way.
Sponsor:
- Physiologic Flexibility Certification Course open Monday, Oct. 13 to Monday, Oct. 20: https://miketnelsons.samcart.com/products/physflex/
Triphasic 2 book now available!
- Go to https://triphasic2.com/
Episode Chapters:
- 01:39 Introduction by Dr. Mikki Williden
- 02:43 Dr. Mike T. Nelson's Background
- 06:53 Discussion on Metabolic and Physiologic Flexibility
- 15:09 Personal Experiences and Experiments
- 16:28 Cold Exposure and Its Effects
- 25:28 Heat Exposure and Adaptation
- 31:36 Psychological Benefits of Cold Exposure
- 34:31 Practical Recommendations for Cold and Heat Exposure
- 39:52 Understanding pH Balance and Acid Tolerance
- 41:52 Understanding Lactate and Its Role in Exercise
- 43:19 Buffering Systems and Supplements
- 49:11 High-Intensity Interval Training (HIIT) Insights
- 53:02 Breathing Techniques and CO2 Tolerance
- 57:44 Altitude Training and Oxygen Regulation
- 01:06:34 Metabolic Flexibility and Ketones
- 01:14:39 Conclusion and Final Thoughts
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