Herman Pontzer is an evolutionary anthropologist at Duke University, where he is associate professor of evolutionary anthropology and global health. He is best known for his research into human bioenergetics. Constrained Daily Energy Expenditure Model. In the context of the exercise paradox (where weight-loss was not a direct outcome of all the calories burned), Pontzer helped develop a theory of human metabolism where the total amount of a human's energy expenditure (calories) is not the additive linear sum of the individual's metabolic parts (e.g.
https://en.wikipedia.org/wiki/Herman_Pontzer