Ep 67 - Eric's Research

Lauren interviews Eric about his research on metabolism and energy expenditure. He describes turning down a tenure-track job to move into science communication and then evolutionary anthropology, studying how humans regulate their energy budget. He explains why people get metabolism wrong in both directions — treating it as mysterious and stretching the real person-to-person variation to impossible extremes — and walks through metabolic adaptation, why reverse dieting usually backfires, and the evolutionary logic of the body's "low-power mode." They get into why resting metabolic rate doesn't crater at menopause (the real changes from 20 to 60 are mostly behavioral), how non-exercise activity works and its limits, and what hunter-gatherer and subsistence populations reveal as a kind of "control group" for modern health. He closes with simple public-health advice — sell people on physical activity, find a sustainable calorie-appropriate eating pattern, get enough fiber from whole food sources — and discusses the ongoing debate over the constrained energy expenditure model.

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Chapters

0:00 From supplements to energy expenditure

7:56 What everyone gets wrong about metabolism

10:12 Metabolic adaptation & reverse dieting

14:13 The evolutionary logic of the energy budget

16:19 Evolutionary head-scratchers

18:25 Metabolism, sex differences & aging

22:35 Non-exercise activity & step counts

28:19 What hunter-gatherers teach us

31:04 The simple public-health message

35:14 The constrained energy model debate

38:26 Wrap-up