That would be good, but even better would be to practice daily a more complex exercise, like a tài-jí-quán form or a karate kata (executed slowly and without ex

That would be good, but even better would be to practice daily a more complex exercise, like a tài-jí-quán form or a karate kata (executed slowly and without excessive force), both of which are excellent mobility and balance exercises for elderly people. I doubt that "exergames" are as efficient as these traditional and proven methods, which require minimal space and time and no equipment.