Leading HIIT Scientist: Most Runners Train VO₂ Max Wrong | Dr. Paul Laursen

Описание: Is Zone 2 better than HIIT? Can improving fat oxidation actually raise your VO₂ max? Does endurance training accelerate cardiac aging?

In this episode of The Endurance Lab Podcast, I sit down with Dr. Paul Laursen — exercise physiologist, HIIT researcher, elite triathlon coach, and co-founder of Athletica — to unpack one of the most misunderstood topics in endurance training: how aerobic base, fat oxidation, and high-intensity interval training actually work together.

We go beyond the simplistic “Zone 2 vs HIIT” debate and explore how building a strong aerobic foundation improves fat oxidation — even at high intensities — and why that may be one of the hidden drivers of a higher VO₂ max ceiling and the ability to run faster for longer.

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📚 Dr. Paul Laursen resources:

Article we spoke about 👉 https://pmc.ncbi.nlm.nih.gov/articles...

Dr. Paul Laursen website 👉 https://www.paullaursen.com/

Science and Application of High Intensity Interval Training
👉 https://www.amazon.com/Science-Applic...

Socials: @hiitscience @athletica_ai


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🎙 About Dr. Paul Laursen

Dr. Paul Laursen has worked within high-performance sport systems connected to the Australian Institute of Sport and High Performance Sport New Zealand. Academically, he is best known for his research on high-intensity interval training and how manipulating intensity, duration, and recovery drives adaptation. He co-authored High-Intensity Interval Training: Science and Application and co-founded HIIT Science and Athletica.


We also discuss:
• The minimum effective dose of HIIT for midlife athletes
• Why fat oxidation at high intensities matters more than you think
• Carbohydrate periodization and “fuel for the work required”
• HRV-guided training and nervous system readiness
• Whether endurance training accelerates cardiac aging
• The neurological benefits of intensity (yes, lactate feeds the brain)
• The real limitations of ChatGPT-generated training plans
• How AI platforms like Athletica differ from generic AI tools
• The future of AI in endurance coaching

If you’re a masters runner, endurance athlete, or coach trying to balance performance with longevity, this conversation will reshape how you think about training intensity, metabolism, and adaptation.


🔬 Topics Covered
VO₂ max
Fat oxidation
Zone 2 training
HIIT science
Carbohydrate periodization
Metabolic flexibility
HRV and nervous system recovery
Cardiac health in endurance athletes
AI in coaching


Chapters
0:00 Intro
2:05 Zone 2 vs HIIT: A False Dichotomy
5:12 Why Aerobic Base Is the Foundation of Performance
13:10 Lactate, Mitochondria & Lower Lactate at the Same Heart Rate
17:17 Fat Oxidation at High Intensities (The VO₂ Max Connection)
30:10 Definition of High Intensity
37:01 The Minimum Effective Dose of HIIT for Midlife Athletes
39:23 HRV, Nervous System Readiness & When NOT to Train Hard
44:34 Does Endurance Training Accelerate Cardiac Aging?
48:09 Neurological Benefits of HIIT (Why the Brain Loves Lactate)
49:49 Carbohydrate Periodization & Fueling Strategy
53:40 Why ChatGPT Training Plans Fall Short
55:02 How AI Coaching Platforms Actually Work
1:00:54 Can AI Detect Overtraining Better Than Coaches?
1:05:11 The Future of AI in Endurance Coaching


#VO2max #Zone2 #HIIT #EnduranceTraining #FatOxidation #MetabolicFlexibility #MastersAthletes #HRV #CarbohydratePeriodization #AIcoaching #MarathonTraining #Longevity