Wearable devices collect health metrics for analysis through various sensors and technologies, such as accelerometers, heart rate monitors, and GPS. These devices continuously track and record physiological data, including steps taken, heart rate variations, and sleep patterns. The collected data is then transmitted to mobile applications or cloud services for analysis and feedback. This enables users to monitor their health status, set fitness goals, and receive personalized recommendations. In healthcare, such data can also assist practitioners in patient monitoring and advancing preventive care strategies.