The Vitality Collective Podcast is a health and fitness podcast and performance podcast focused on strength, longevity, and real-world performance, bridging the gap between health and performance.

Hosted by Dr. Jeremy Bettle, PhD — an internationally recognized expert in Human Performance with over 20 years of experience working with elite athletes and high performers — this podcast brings world-class expertise straight to you.

Built from elite sport and applied to real life, it breaks down what actually drives resilience, health, performance, and long-term capability.

The debate online is loud — go high carb, go keto, pick a side — but your body was never designed to pick a side.

This episode with Dr. Mike T. Nelson, PhD, a researcher and coach who specializes in metabolic flexibility and heart rate variability, breaks down why the fat-versus-carbohydrate debate is the wrong conversation to be having and what it actually means to train your metabolism to do both well.

If you have been asking yourself why you can’t sustain energy through the day, why your body composition isn’t shifting despite your effort, or why the diet advice you keep finding online seems to contradict itself — this is the episode for you.

Guest Bio

Mike T. Nelson, PhD, MSME, CSCS, CISSN, is a research fanatic who specializes in metabolic flexibility and heart rate variability, as well as an online trainer, adjunct professor, Associate Professor at the Carrick Institute, presenter, creator of the Flex Diet Cert, kiteboarder, and (somewhat incongruously) heavy-metal enthusiast. He has a PhD in Exercise Physiology, and a MS in Mechanical Engineering (biomechanics). The techniques he’s developed, and the results Mike gets for his clients have been featured in international magazines, in scientific publications, and on websites across the globe. In his free time, he enjoys spending time with his wife, lifting odd objects, reading research, and kiteboarding as much as possible.

Links and Resources

• Dr. Mike T. Nelson’s website: www.miketnelson.com

• Flex Diet Certification: https://miketnelson.com/flex-diet-certification

• Flex Diet Podcast: https://podcasts.apple.com/us/podcast/flex-diet-podcast/id1488376804

• Dr. Mike T. Nelson on Instagram: @drmiketnelson

Three Actionable Takeaways

1. Start your day with a morning walk. As soon as you get out of bed, go for a short walk — five minutes, ten minutes, half an hour, whatever you can manage. It regulates circadian rhythms, provides early sunlight exposure, gets movement in a low-insulin state, and requires nothing except putting your shoes on and walking out the door. Dr. Nelson called this his single top intervention for the general population.

2. Increase your protein intake from real food sources. Higher protein is one of the highest-leverage nutritional changes most people can make. Dr. Nelson was direct about sourcing: actual grilled or cooked animal proteins, not protein-fortified processed snacks. The compliance barrier is low and the physiologic return is high.

3. Do formal exercise and track your output. Whether you start with lifting or cardio does not matter. What matters is measuring what you actually do. For resistance training: track load, sets, and reps. For cardio: track a concrete output like distance rowed in a set time. Over time, progress that number. The goal is more formal movement done intelligently so you capture both the caloric benefit and the long-term adaptations.