I remember reading the Hazada paradox, where they found these Hadza tribe members who live an active life, walking miles, hunting, and doing all physical labour, have the same maintenance calories as a Western person.

So where does the energy burn in a sedentary population come from vs highly active Hadza tribe members?

Pontzer’s research showed that while the Hadza were highly active, they actually demonstrated lower baselines of certain markers of metabolic and physiological stress over time compared to Western populations.

Don't quote me on this; I am paraphrasing things I remember from.