Physical therapist David Briscoe and assistant Katie Snodgrass, left, lead patient Valerie McGill through the warrior pose, a yoga move designed to increase balance and strength.

Briscoe has dubbed his use of Nintendo Wii at the clinic “Wii-Hab.”

This Wii Fit game has a girl trying to hit soccer balls with her head. The girl’s moves mimic those of the player — in this case McGill — standing on the pad behind. McGill, who suffers from balance problems, has to work hard to stay steady while moving her head to try to “hit” the balls.