Record Heart Rate
Heart rate monitors attach to the chest near the area of the heart with a strap or belt. Each time the heart beats, an electrical signal travels through the heart muscle, instructing it to contract. This electrical signal is detectable through the skin. An electrode inside the main unit measures the heart's electrical activity to determine how quickly the heart is beating. For accuracy, the transmitter must remain firmly against the skin.
Transmit and Display Data
After being recorded by the transmitter, the heart's electrical activity is transmitted to a receiver that's typically worn on the wrist. Basic heart rate receivers only display the current heart rate, but more elaborate monitors can calculate average and maximum heart rate. Most receivers are wireless and can be fastened to a belt or waistband. Other models provide heart rate information via headphones.
Monitor Heart Rate During Activity
Heart rate monitors help determine the effectiveness of aerobic exercise, and are useful for monitoring the intensity of exercise. They're also helpful for anyone with a heart condition or other medical disorder that requires continuous and accurate heart monitoring during activity. Some heart rate monitors enable users to record and print out heart rate data that can be used to improve workouts or identify heart-related problems.
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