That may be true but I also wouldn't be surprised if, in modern context, being fit can begin with something cognitive. In my own experience, when I've been out

That may be true but I also wouldn't be surprised if, in modern context, being fit can begin with something cognitive. In my own experience, when I've been out of shape, I felt that I wasn't living to my own expectation and felt some drive to improve. The exercise that followed seemed to improve my thinking too, so there was a bit of an upward cycle.