When you first step onto the Wii Balance Board, a sturdy platform that comes with the system, it asks for your age and height and figures out your body mass index (BMI). Sensors in the board detect a user's weight and balancing skills, too, because you are given a balance assessment. Once you get past the assessment, you can pick a trainer -- male or female, and then choose from aerobics, strength training, yoga or balance. Each segment (there are more than 40) is only about three to five minutes -- not enough to break a sweat in a serious gym rat, but okay for the person who wants to have some fun and start an exercise regimen. "     

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