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 increased physical activity does not always lead to weight loss—Pontzer helped develop a theory of human metabolism known as the constrained daily energy expenditure model.
https://en.wikipedia.org/wiki/Herman_Pontzer