Walking Gait Adjustment Reduces Knee Osteoarthritis Pain and Cartilage Damage

A clinical trial indicates that a small adjustment to walking gait can significantly reduce knee osteoarthritis pain and slow cartilage degradation. This personalized approach to foot angle during walking showed pain relief comparable to common medications. Magnetic resonance imaging (MRI) scans also suggested less knee cartilage deterioration in participants who received the gait retraining.

Osteoarthritis affects nearly one in four adults over 40. It causes the gradual wearing down of cartilage cushioning the joints. Current treatments primarily focus on pain relief, with joint replacement as an option for severe cases. This new research offers a non-pharmacological and non-surgical alternative.

The year-long randomized controlled trial involved individuals with mild to moderate osteoarthritis in the medial compartment of the knee. Researchers at the University of Utah, New York University, and Stanford University conducted the study. Participants were trained to make a specific, personalized change to their foot angle while walking. Some individuals benefited from turning their toes slightly inward, while others improved by pointing them outward.

This study is the first placebo-controlled trial to demonstrate that a biomechanical intervention can treat osteoarthritis symptoms and potentially slow joint damage. Previous trials prescribed the same intervention to all participants. This often resulted in varying effectiveness or even increased stress on the knee for some individuals. The personalized approach in this study was crucial for its success.

Participants underwent six weekly training sessions using a device that provided vibration feedback to maintain the assigned foot angle. After the training, they were encouraged to practice the walking pattern for at least 20 minutes daily. Follow-up visits confirmed participants maintained their prescribed foot angle. The reported decrease in pain was significant. Researchers also observed slower degradation of cartilage health markers in the intervention group.

Researchers emphasize that this intervention requires careful measurement and personalization. An incorrect adjustment could worsen knee stress. The current method uses expensive and time-consuming motion capture systems. The research team aims to simplify the process for wider clinical use, potentially through physical therapy with mobile sensors.