Fitness-Tracker-Style wristband could help patients build muscle before joint surgery

This study tests whether a wearable bioimpedance wristband (like a fitness tracker) helps people with severe obesity and knee osteoarthritis improve their body composition—gaining muscle and losing fat—before joint replacement surgery. All participants receive coaching on body composition, but half also use the wristband to track their progress. The goal is to see if the wristband leads to better changes in muscle and fat compared to coaching alone.