Gaming the Scale - Wii Fit

If this year you wind up using a videogame to get in better shape, you will have to thank a sumo wrestler.

The idea for Nintendo's latest hit "Wii Fit" -- a game that allows players to shimmy and twist their way through virtual worlds -- only came together when Takao Sawano, general manager for Nintendo's Entertainment Analysis and Development division, saw sumo wrestlers weighing in for a match on television.

The result is a sensation sweeping Japanese households, with families sweating their way through aerobics workouts and jogging down virtual mountain trails.