After a number of inquiries about heart rate zones and the best ways to train, we brought back a very popular episode featuring WHOOP Global Head of Human Performance, Principal Scientist, Kristen Holmes and endurance coach Paul Laursen. Paul is a Zone 2 cardio expert and has competed in 17 Ironman triathlons. He is the Co-Founder and CEO of HIIT Science and co-host of the Training Science Podcast. He’s published over 150 scientific manuscripts and had his work cited more than 15,00 times. Kristen and Paul will discuss how Paul got started training and teaching (3:05), the relationship between the cardiovascular system and the nervous system (6:13), defining the different training zones (10:48), creating a weekly program with cardio zones (24:51), staying balanced with your training (29:08), autonomic recovery and Zone 2 as an active recovery tool (35:17), how Zone 2 can be linked to hormone levels (36:57), Paul’s paper on metabolism and burning fat (41:51), the best medium for Zone 2 training (47:49), training for longevity and VO2 max (50:51), and how Paul thinks about sleep with his athletes (52:38).

Resources:
Paul's Website
Paul’s Twitter
HIIT Science
Autonomic Recovery after Exercise in Trained Athletes
Athletes: Fit but Unhealthy
Fat Oxidation during HIIT

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