How We Burn Energy

About this episode

This episode discusses Total Energy Expenditure and Basal Energy Expenditure, their measurement, and the factors influencing metabolism across the human lifespan.

This episode provides an overview of Total Energy Expenditure (TEE) and Basal Energy Expenditure (BEE) , emphasizing their definitions, measurement methods, and patterns across the human lifespan. It explains that TEE is the total of all calories burned, comprised mainly of BEE (the energy needed for basic functions at rest), the Thermic Effect of Food , and Physical Activity Energy Expenditure . Contrary to common beliefs, I explain that metabolism remains stable from ages 20 to 60 , and midlife weight gain is primarily linked to lifestyle shifts rather than a sudden slowdown. The episode stresses the importance of objective measurement techniques, such as doubly labeled water for TEE, and highlights that body composition , particularly lean mass, is the main determinant of BEE. Finally, it corrects misconceptions regarding the impact of exercise and notes that metabolism declines gradually only after age 60, largely due to loss of lean tissue. Sources : Herman Pontzer, Yosuke Yamada, Hiroyuki Sagayama, Philip N. Ainslie, Lene F. Andersen, Liam J. Anderson, Lenore Arab, Issaad Baddou, Kweku Bedu-Addo, Ellen E. Blaak, Stephane Blanc, Alberto G. Bonomi, Carlijn V.C. Bouten, Pascal…

People in this episode

Host: Milan Toma

Topics covered

• Total Energy Expenditure
• Basal Energy Expenditure
• caloric burn
• metabolism
• body composition
• lifestyle changes

Keywords

• energy expenditure
• metabolism
• calories burned
• lean mass
• lifestyle shifts
• exercise impact

Mentioned in this episode

Books & works: Daily energy expenditure through the human life course, Science

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