It's true. My 83 year old mother had a mini stroke and had a fall three years ago. The results were that she used a walker where ever she went. Never fell again but was very tentative walking. She does walk 1.5 to 2 miles a day but with a walker.
Well, I got a Wii for Christmas and she's been playing WiiFit and Marble Saga three times a week with the balance board. After about 3 months... she no longer uses a walker. She is far more confident and is excited to workout on her Wii. She had tried physical therapy, accupucture and various medications. The Wii was the answer. It's worth it's weight in gold to our family.