Exercise: joy, not punishment

The New York Times has a splendid article about re-framing exercise as an activity of pleasure rather than work.  I confess I used to think of exercise as work, and still often do. So how can we make this change?

I used to hate running in particular. But very recently, only after reading "How to Run", and actually changing how I do run, I began to enjoy it much more. So getting our form right may be part of the battle.

Maybe we should quit using the word "exercise" to mean voluntary physical exertion.  "Sport" is a much more positive word, but suggests competition. Anyone have any suggestions?

Image from the NY Times