Lose weight and become fitter by Wii-ing a lot
Using the Wii-mote can be a truly physical experience. But like most things, once you learn the techniques, the natural tendency is to make less work for yourselves.
For example, when we first started playing Wii Sports Tennis, we were doing the full on tennis motions, full back swing, following through and smashing with gusto. Thought this is a heck of a lot of fun, after a while it was evident that the game could be played sitting on the couch and flicking the wrist.
The point is that the Wii-mote provides a unique, fun way to play games, especially with a group. Laughs aplenty and grins all round.
But when the last drink has been drunk and your guests have left you, or you just want some solo play, there is a definite reluctance (especially as a seasoned video gamer) to put the full physical effort in.