Effect of High-Intensity Strength Training on Knee Pain and Knee Joint Compressive Forces Among Adults With Knee Osteoarthritis

Abstract

Osteoarthritis is the most common form of arthritis and a leading cause of disability among adults.¹ A report from 2012 estimated that knee osteoarthritis affected more than 250 million people worldwide.² Clinical guidelines recommend strength training for patients with knee osteoarthritis based on clinical trial evidence of effectiveness.³ Improved strength mediates pain relief,⁴ enhances psychological well-being,⁵ maintains cartilage integrity in animal models,^6,7 and may increase the shock absorbing capability of lower extremity muscles during walking.⁸ Limitations of prior randomized trials of strength training for patients with osteoarthritis include the use of training intensities below those recommended by practice guidelines^9-13 and use of short-duration interventions, lasting between 6 and 24 weeks.^11,12