A heart rate monitor is the piece of equipment used to measure heart rate. These monitors can range from simple handheld devices to more advanced wearable technology, such as chest straps or wrist fitness trackers. They continuously monitor the electrical signals produced by the heart to provide real-time data on heart rate during various activities, including exercise or rest. Heart rate monitors are commonly used by athletes to optimize their training intensity and by health professionals to assess cardiovascular health. Understanding heart rate can help individuals manage their fitness levels, track progress, and maintain overall health.