15 Minutes of This Rewires Your Brain & Metabolism — The Science of Lactate | Dr. Stephanie

Dr. Stephanie Estima gives a masterclass on the often-overlooked
role of lactate in how our bodies work during exercise. She’s
redefining lactate as a key metabolic signal that can help us get
stronger, age better and think sharper.


In this solo episode, Dr. Stephanie gets into how lactate is
made, how it fuels our energy and why it’s so important when we
push ourselves hard. Dr. Stephanie is a big fan of sprinting
because it helps us build metabolic power and stay strong, and
she’ll also talk about how to use it right and how to recover
well.


Episode Overview:
(0:00) Introduction — Lactate Is Not the Enemy
(2:15) Welcome & Episode Roadmap
(4:30) The Myth: How We Got Lactate Wrong
(7:00) What Lactate Actually Is (The Biochemistry)
(9:30) Why Lactate Forms Even With Oxygen
(15:00) The Gear Analogy — Don't Be Metabolically Polite
(18:00) Metabolic Flexibility & Why HIIT Matters
(22:00) How to Dose Your Sprints (Beginner to Advanced)
(24:30) The Lactate Shuttle — Redistribution, Not Waste
(28:30) Mitochondrial Biogenesis & Longevity Signals
(32:00) Lactate and Your Brain — BDNF, Fog & Cognitive
Edge
(38:30) Dosing, Recovery Rules & Programming
(46:00) Closing — You Are Remodelling Yourself


Resources mentioned in this episode:
https://drstephanieestima.com/podcasts/ep469


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