We Need to Rethink Exercise (Updated Version)

Losing weight is difficult because your body tries to keep its energy use stable, even if you exercise more. While exercise burns some calories, your body often reduces other activities or adapts over time, meaning you don't burn much more overall. This is because humans evolved to be very efficient at getting and using calories, which was important for survival when food was scarce. Exercise is still very healthy, as it helps balance your body's systems, reducing inflammation and stress, but it's not the main way to lose weight. To lose weight, reducing how much you eat is more important.