Herman Pontzer did such a study for the Hadza who eat a lot of honey.
He came to conclusions like “To Pontzer, this means that the human body seems to adjust to physical activity by saving calories on other physiological processes to keep total energy expenditure in check.”
The key here would be an exact quantification: how much carbs do these cultures consume in relation to the amount of physical activity.
Herman Pontzer did such a study for the Hadza who eat a lot of honey.
He came to conclusions like “To Pontzer, this means that the human body seems to adjust to physical activity by saving calories on other physiological processes to keep total energy expenditure in check.”