Gait Retraining Reduces Osteoarthritis Pain and Cartilage Degradation

A small adjustment to a person's walking pattern may reduce knee osteoarthritis pain and slow cartilage damage. This finding comes from a year-long clinical trial. Researchers from the University of Utah, New York University, and Stanford University conducted the study. The results were published in *The Lancet Rheumatology*.

Nearly one in four adults over 40 experiences osteoarthritis. This condition causes cartilage to wear down, leading to pain and disability. Current treatments focus on pain relief. Joint replacement is an option for severe cases. This new research suggests a biomechanical intervention could offer another treatment path.

The trial involved people with mild to moderate osteoarthritis in the knee's medial compartment. Participants received personalized training to adjust their foot angle while walking. Those in the intervention group reported pain relief comparable to common medications. Magnetic resonance imaging (MRI) scans also showed less knee cartilage deterioration in this group compared to a placebo group.

Researchers determined the optimal foot angle adjustment for each participant. Some benefited from turning their toes inward, others outward. This personalized approach was crucial. Previous studies that used a universal adjustment were less effective. The study is the first placebo-controlled trial to demonstrate that a biomechanical intervention can treat osteoarthritis symptoms and potentially slow joint damage.

Participants underwent six weekly training sessions. They used a device providing vibration feedback to maintain the new foot angle. After training, they were encouraged to practice the walking pattern daily. Follow-up visits confirmed participants maintained their prescribed foot angle. This drug-free option could help individuals manage osteoarthritis for decades before considering joint replacement.

The researchers emphasize that this technique requires expert guidance. Incorrect adjustments could worsen knee stress. The current method uses expensive motion capture systems. The research team aims to simplify the process for wider clinical use, potentially through physical therapy and mobile sensors.