A Study of the Effectiveness of Different Types of Exercise for People With Knee Osteoarthritis

Radiographic knee OA is present in an estimated 37% of Americans over the age of 60, representing more than 13 million people. Current medical, non-surgical knee OA treatments focus primarily on symptomatic relief and have met with limited, temporary success. Various therapeutic exercise prescriptions have been used to help ameliorate knee OA symptoms and improve function. Leg strength training is most commonly used. However, recent evidence suggests that shorter programs of kinesthesia, balance and agility (KBA) techniques may result in more rapid symptom relief and functional improvements in comparison to traditional therapeutic exercise. These early benefits could potentially lead to greater long term exercise adherence. In a case study of an elderly female patient with dynamic knee instability related to OA, physical therapists reported success with a combination of KBA training and traditional therapeutic exercise. These findings need to be verified in a controlled clinical trial. This pilot study will help determine the proper testing and exercise training methods for a larger clinical trial, and will indicate if KBA training done without concurrent strength training is a viable intervention. Research Hypothesis: Among men and women age 50 and over with Kellgren and Lawrence (1957) Grade 2 or higher symptomatic tibiofemoral OA in one or both knees, an 8-week, 3-day per week kinesthesia, balance \& agility (KBA) exercise program - designed to increase dynamic neuromuscular knee stability - safely and effectively changes physical function more effectively than standard leg strength training