Since we know that exercise is not about weight-loss, but about a life-long health-building habit, it's important to find an exercise that you like. Dance is probably one of the oldest forms of "exercise." Most tribes use it in both religious and mating rituals. Unfortunately, it's hard to know what kind of dance ancient humans practiced since they didn't have Youtube back then. Contemporary anthropologists have recorded instances of tribes dancing all night without food or drink. Sounds familiar.