Wii Fit helps everybody in the household to exercise and manage their health in an interactive and entertaining manner. The software comes bundled with the Wii Balance Board which can measure weight and balance, which allows for the body movement to become the control interface. It is used to perform and measure player performance during exercise as well as calculating the BMI and Wii Fit Age. Consequently, goals can be set to lose or gain weight and effectively change the user's BMI.

• Control on-screen action with your movements on the balance board as you work your way through a variety of challenges aimed at getting you off the couch and into the action. Check your Body Mass Index (BMI), see your Wii Fit Age and keep tabs on your daily progress towards a more fit you.
• Get fit with more than 40 activities and exercises, including strength training, aerobics, yoga and balance games. Whether you're doing a yoga pose or snowboarding down a slalom course, there's an activity for everyone.
• Challenge your family and friends to get in shape! Create your own personal profile and set goals, test your balance, track your progress with daily workouts and unlock new exercises and activities.