But last Christmas, as Wii Fit flew off shelves, fitness became a viable genre. With its mostly positive encouragement and a limited variety of exercises and activities, the original Wii Fit managed to get people thinking about their health while standing in front of their TVs.

Now Nintendo has released Wii Fit Plus, not a wholly new game but more of an expansion on the original formula.

Like Wii Fit, the Plus version includes yoga, balance and strength-training activities alongside more game-like fitness tests. All of the original activities are included, but Plus offers 15 new games and changes up the fitness assessment.

Along with calculating body mass index, or BMI, the game now also attempts to measure a player's mental fitness. Some exercises require players to perform basic intellectual feats, like using their hips to solve math problems.

The title also includes a baby mode for those under three years of age. This odd feature allows a parent to hold their child to estimate their weight by subtracting the parent's information. It's a questionable feature, but for those who need a scale hooked up to a video game, Nintendo provides.

Wii Fit Plus is not a must-buy for current Wii Fit owners. The additional exercises add some variety, but the game's hardly worth repurchasing.

Nintendo's not the only one in the fitness business these days - THQ and NBC have brought the reality show The Biggest Loser to the Wii in the form of a new competitive weight loss and fitness program.

Loser takes a more holistic approach to fitness by including diet and lifestyle tips along with the exercises. The game offers a fitness plan, and allows players to build a more customized health plan than Nintendo's title offers.

Plus, if you're a fan of the show, you'll love that trainers Bob Harper and Jillian Michaels are virtually available to help you train. Super-motivated players can even purchase a Nintendo DS version of the game for "on the go" recipes and fitness management.

Should any game be labeled the Citizen Kane of video games? Shawn Sines hashes it out with the Dispatch's Nick Chordas; click to dispatch.ning.com to listen to the Game On! podcast.