My mum and dad got a wii with wiifit a few years ago with the vision of using it for maybe an hour a week and lose some weight (my mum isn't the most active person ever) and well... my mum got on the board and it went through all the testing, weighing, yada yada yada and told her she had a fitness age of about 15 years above her actual age! Needless to say, she never used it again