Wii as your personal trainer

Video games used to be blamed for keeping kids on the sofa and contributing to obesity, but Nintendo has thrown that theory out the window.

Anyone who has played on a Wii will tell you that more than 30 minutes playing many of the games often results in sore muscles and aching limbs for days afterwards.

Now Nintendo has gone a step further and taken the Wii into the gym.

At this year's E3 (Electronic Entertainment Expo) event, Nintendo unveiled the Wii Fit, a flat board that with sensors on its surface.

The idea is to encourage 'gamers' to do more than simply solve puzzles, hit balls, or kill monsters.

By sensing how a user is balanced on its surface, Wii Fit now allows a new form of interaction with the game console.