Keep Your Heart Rate to Yourself: Building Privacy-First Fitness AI with Federated Learning

In the era of hyper-personalized fitness, data is the new "pre-workout." We want our smartwatches to tell us exactly how many calories we burned, but there’s a massive catch: Privacy. Giving a centralized cloud server access to every heartbeat, GPS coordinate, and sleep cycle feels increasingly like a security nightmare. This is where Federated...