Effectiveness of Neuromuscular Electrical Stimulation in Improving Muscle Strength and Function in Patients with Osteoarthritis of the Knee

Project Abstract

This project aims to investigate the effectiveness of neuromuscular electrical stimulation (NMES) in improving muscle strength and function in patients with osteoarthritis (OA) of the knee. Osteoarthritis is a leading cause of disability worldwide, affecting millions of individuals, and the knee joint is one of the most commonly affected sites. Patients with knee OA often experience significant muscle weakness and functional impairment, which can further exacerbate the progression of the disease and limit their ability to perform daily activities. Numerous studies have suggested that NMES, a non-invasive technique that uses electrical impulses to stimulate muscle contractions, may be a promising intervention for improving muscle strength and function in individuals with knee OA. NMES has been shown to increase muscle activation, improve joint stability, and reduce pain, all of which are crucial factors in managing the symptoms of knee OA. However, the existing evidence on the effectiveness of NMES in this population is limited, and more research is needed to fully understand its potential benefits. The primary objectives of this project are to (1) evaluate the impact of NMES on muscle strength, as measured by isometric and isokinetic dynamometry, in patients with knee OA, and (2) assess the effects of NMES on functional outcomes, such as self-reported physical function, gait parameters, and performance-based tests, in the same patient population. The study will involve a randomized, controlled trial design, where participants with knee OA will be randomly assigned to either an NMES intervention group or a sham (placebo) control group. The NMES intervention group will receive a standardized NMES protocol targeting the quadriceps and hamstring muscles, while the control group will receive a sham treatment that mimics the sensation of NMES without the muscle stimulation. Both groups will undergo a 12-week intervention period, with assessments of muscle strength and functional outcomes performed at baseline, mid-intervention, and post-intervention. The expected outcomes of this project are twofold. First, it is hypothesized that the NMES intervention group will demonstrate significant improvements in muscle strength compared to the control group, as evidenced by increased torque production and muscle activation on the dynamometry assessments. Second, it is anticipated that the NMES group will also show greater improvements in functional outcomes, including self-reported physical function, gait parameters, and performance-based tests, compared to the control group. The findings of this project will have important clinical implications for the management of knee OA. If NMES is found to be effective in improving muscle strength and function, it could be incorporated into the standard of care for patients with knee OA, providing a non-invasive and potentially more accessible intervention to address the debilitating symptoms of this condition. Furthermore, the results of this study will contribute to the growing body of literature on the use of NMES in the rehabilitation of musculoskeletal disorders, informing future research and clinical practice.

Project Overview