A surprising discovery in the world of exercise has left many wondering if physical activity is truly effective for weight loss. The "exercise paradox" suggests that while regular exercise is essential for overall health, it may not lead to significant weight loss or increased calorie expenditure. Studies have shown that populations with high levels of physical activity, such as hunter-gatherer tribes, burn similar numbers of calories per day as sedentary individuals in industrialized societies.

Source: https://en.wikipedia.org/wiki/Exercise_paradox