In this episode, I talk to Dr. Mike T. Nelson about metabolic flexibility and heart rate variance (HRV). For a free 7 Day Natural Bodybuilding prep course go to: https://members.healthmastery.co/optin1592314349648 For 1:1 Bodybuilding coaching: www.Healthmastery.co My Instagram: https://www.instagram.com/adammc192/ Mike's website: https://flexdiet.com/ Mike's Instagram page: https://www.instagram.com/drmiketnelson/ 01:00 Intro to Mike 07:02 What is metabolic flexibility 08:50 Can healthy people affect their metabolic flexibility 12:55 Does diet type or exercise intensity affect fat loss 20:00 Does substrate utilisation shift throughout the day 25:15 What is VO2max 31:05 Is metabolism local to the muscle 38:15 What is Heart rate variability 41:40 Why is HRV higher in a parasympathetic state 47:00 Are wearables accurate for HRV 51:25 Is natural intuition as accurate as a device 53:20 What's the issue with stress 1:01:02 Can stress impact health and body composition 1:05:50 What's the best device for accuracy 1:08:30 More about Mike