A Heart Rate Monitor is a device that measures your heart rate, or the number of times your heart beats per minute. It is commonly used during exercise to help individuals track their fitness levels and ensure they are working within their target heart rate zones. These monitors can be worn as wristbands, chest straps, or integrated into smartwatches. Heart rate monitors work by detecting the electrical signals produced by the heart as it beats. Many modern devices also offer additional features, such as tracking calories burned and monitoring sleep patterns. They are popular among athletes and fitness enthusiasts for optimizing workouts and improving overall health.