A heart rate monitor is a device that tracks the number of times your heart beats per minute. It helps individuals monitor their heart rate during various activities, such as exercise or rest. These devices can be worn on the wrist, chest, or even as a smartwatch, providing real-time data to help users understand their cardiovascular health. Heart rate monitors are commonly used by athletes and fitness enthusiasts to optimize their training. By analyzing heart rate data, users can determine their exercise intensity and ensure they are working within their target heart rate zones, which can enhance performance and improve overall fitness.