Simple: evolutionary humanity had to move and endure if it wanted to survive. But you did it because you had to, not because wasting energy was something you li

Simple: evolutionary humanity had to move and endure if it wanted to survive. But you did it because you had to, not because wasting energy was something you liked. But guess what people liked even less? Dying, suffering or seeing their loved ones die and suffer. So hard work had to be done so the future was survivable. Fat or sweet food now was always superior to no food later. This has probably been the case for the majority of the human population throughout history. Now we have a modern society with division of labor, good wealth (in comparison to previous generations) and safety. If you got a desk job and a car you literally stopped moving. This was not possible ever before in human society, except for the lucky few. I totally recommend doing sports. The brain functions better if your body does what it was made for.