Integrative Application of Neuromuscular Electrical Stimulation in Musculoskeletal Disorders

Abstract

Neuromuscular electrical stimulation (NMES) is a non-invasive technique that activates motor nerves to induce muscle contractions, thereby preserving muscle strength in patients who are unable to perform high-intensity voluntary exercise. While increasingly integrated into musculoskeletal rehabilitation, the additional benefits, optimal parameters, and indications of this approach remain debated. This systematic review synthesizes evidence on NMES as an adjunctive therapy for knee osteoarthritis (KOA), patellofemoral pain (PFP), chronic low back pain (CLBP), total knee arthroplasty (TKA), anterior cruciate ligament (ACL) reconstruction, shoulder surgery, ICU-acquired weakness (ICUAW), and sarcopenia.The results indicate that NMES in conjunction with exercise therapy has synergistic effects in the areas of pain relief, muscle strength improvement and functional recovery. The therapeutic action is time-dependent. Initiation early (within 48 hours to 1 week post‑surgery) proves beneficial. Chronic pain conditions need more than 4 weeks of treatment to achieve meaningful improvement. Parameters suggested are in KOA 50-75Hz, pulse length 200-400 μs, and at least 20 minutes per session. After knee surgery, initiate in the first 2 weeks, frequency ≥50Hz, and maximum tolerable amplitude. There is currently sufficient evidence that may allow the inclusion of NMES to conventional exercise therapy, especially in cases where patients cannot actively participate in exercise because of pain, immobilization or arthrogenic muscle inhibition. It is necessary to conduct additional studies in order to develop standardized parameter protocols across various diseases.