Update: Because a picture can say a thousand words, we've added some screens to the game album. Enjoy.
The title will ship worldwide this Autumn bundled with the balance board or as a standalone game if you already have the peripheral.
The main thrust of the game seems to be that it tailors an exercise regime specifically to your needs. There are six new strength and yoga activities and users can now target specific parts of their body to tone and work on in the game.
Intervals between exercises are also now optional, meaning you can keep going for as long as you want without the game stopping you. The living room just turned into a far more smelly and unpleasant place...
Fitness can also mean fun, apparently, and to ram home the point Nintendo have fifteen (count 'em) new balance games on offer to break up the relentless trudge of actual exercise, the most exciting of which (that was shown, anyway) is a assault course that you have to run and jump your way through.
Or as the press release puts it:
Wii Fit attracted millions of new players to the world of video games, and now Wii Fit Plus offers a range of new features and enhancements, along with exercises and balance games designed to keep workouts fun. Players will find an additional dimension to the Wii Fit experience as they easily set their own customized daily workout routines or choose 20-, 30- or 40-minute workouts based on how much time they have available. Users will also be able to choose from specialized workout routines that help players strive toward specific objectives, like toning tummies, tightening arms or even reducing stress. Workouts combine the original Wii Fit activities and selections from 15 new balance games and six new strength training and yoga activities.Wii Fit Plus will come packed with the Wii Balance Board accessory, and also will be sold separately as software for people who already have a Wii Balance Board at home. Both will be available in fall 2009.