The effect of combined balance and strength exercise program in patients with different grades of primary knee osteoarthritis

Abstract Background Knee osteoarthritis (KOA) is a degenerative disease that affects all parts of the joint including the surrounding ligaments, tendons, and muscles. Biomechanical changes that occur in KOA cause aggravation of symptoms with further joint damage. Thus, modifying the biomechanics of the knee joint may help in the prevention and treatment of KOA. For that reason, our aim was to assess the effect of combined balance and strengthening exercise programs in patients with different grades of primary KOA. Results All studied groups showed comparable significant improvement in quadricep muscle strength, Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score (< 0.001), time-up and go score (< 0.001), 6-m walk time (< 0.001), and dynamic balance (< 0.001) at the end of exercise program. Furthermore, patients with mild-moderate KOA showed a significant improvement in pain, physical function, total WOMAC scores, and dynamic balance compared to those with more severe KOA. Conclusion Combined balance and strengthening exercise programs may help improve pain, physical function, and dynamic balance in patients with KOA regardless of its severity. However, following exercise patients with milder forms of KOA may show greater improvement compared to patients with severe KOA.