Neuromechanical Risk Factors for Knee Osteoarthritis: How Altered Muscle Activation and Ground Reaction Forces Drive Joint Degeneration

Piri, Ebrahim

doi:10.48311/ijmpp.2026.119211.82919

Neuromechanical Risk Factors for Knee Osteoarthritis: How Altered Muscle Activation and Ground Reaction Forces Drive Joint Degeneration

Editorial

Author

Ebrahim Piri

University of Mohaghegh Ardabili

10.48311/ijmpp.2026.119211.82919

Abstract

Knee Osteoarthritis (KOA) is conventionally viewed through the lens of structural cartilage degeneration, yet accumulating evidence positions it as a manifestation of persistent neuromechanical dysfunction. This editorial argues that altered lower-limb muscle activation patterns and resultant abnormal Ground Reaction Forces (GRFs) are critical, underappreciated drivers of joint pathology. ElectroMyoGraphic (EMG) studies reveal characteristic changes, such as quadriceps inhibition and altered gluteal timing, which persist even post-recovery, suggesting maladaptive motor programs are continuously stressing the joint. These neuromuscular deficits translate directly into abnormal kinetic profiles, characterized by elevated vertical loading rates and asymmetric GRFs, which accelerate cartilage micro trauma. Critically, these mechanical signatures of impaired coordination often precede radiographic signs or symptoms. Once established, altered muscle control and abnormal GRFs reinforce each other, creating a vicious cycle that leads to cumulative joint damage. Effective KOA prevention requires a paradigm shift beyond static structural assessment toward dynamic neuromuscular evaluation. Incorporating EMG and GRF analysis into clinical decision-making can facilitate early, targeted interventions, such as gait retraining, offering a path toward restoring physiological joint loading and achieving sustainable long-term joint health.

Keywords

Knee Osteoarthritis

Neuromuscular

Ground Reaction Forces

Muscle Activation

Gait Analysis

Subjects