While some users of the Wii complained of soreness or 'Wii elbow' when playing it too much, others are heralding its workout value. The University of Toronto is working on a 'therapeutic video game' for the Wii that is designed to help children with hemiplegic cerebral palsy exercise their weaker limb, people are claiming weight loss and in the January issue of Pediatrics the Mayo clinic is proposing that gaming systems like the Wii can combat child obesity