My husband had knee surgery last May and, like most patients his age, his knee has not been the same. The physical therapy sessions helped but he needed something more challenging to strengthen his muscles. We found out about HOP (Hawaii Optinum Performance) located in Waipio near Costco. His first session was a solid hour of controlled movements, balancing stances, and strength exercises that would challenge most physically fit non professional athletes. He is still attending his one hour training 3X a week and there has been significant improvement in his knee. If I have another knee surgery, I will definitely sign up with HOP.
http://www.hoptraining.com/d/d/waipio-athletic-sports-fitness-training.html