[Shadowed_]

From evolutionary point, you adapt for what gets you survive and reproduce. Survival has two main components: physical survival (not being killed/maimed too much) and energy (not starving to death). On energy part, you have positive (food) and negative (base metabolism that keeps you alive and physical activity). You can't do much about base metabolism but you can develop love for food (primarily sugar and fat as main source of energy) and hate to physical activity. However, here comes physical survival. For it you have to have activity to avoid predators, to find/catch food and to build shelter. So, in conclusion, from evolutionary standpoint, you hate activity so you don't do it needlessly but your body is adapted to be good at it for when you really have to.