Effects of Medial Thrust Gait on Lower Extremity Kinetics in Patients with Knee Osteoarthritis

Background. Medial thrust (MT) gait is a nonsurgical approach for reducing the knee adduction moment (KAM) in patients with knee osteoarthritis. However, its usefulness is indeterminate due to scarcity of research about changes in lower extremity kinetics and the ground reaction force (GRF) which have been investigated in this study. Materials and methods. Twenty patients (6 males, 14 females, age: 56.2±6.2 years) with medial knee osteo­arthritis participated in this cross-sectional study. A 12-camera motion analysis system and two force plates recorded kinematic and GRF data while participants walked barefoot along a 12m path with 1) their regular gait pattern and 2) MT gait pattern. The first peak adduction and flexion moments of the hip, knee, and ankle, and the sagittal and frontal GRF were measured. The center of pressure (CoP) location in the mediolateral direction at first KAM peak was also determined. Results. MT gait significantly reduced the first KAM peak (mean difference= 169.7, p