A heart rate monitor collects information regarding a user’s pulse and uses a mathematical formula to calculate the calories burned. The formula is based on a person’s age, weight, gender and heart rate zones.
A heart rate monitor must initially collect data about the user to determine the parameters of the calculations. A heart rate monitor needs to know the user’s resting heart rate zone and maximum heart rate zone to correctly assess the person’s various heart rate training zones. As the user exercises, the heart rate monitor counts the user’s heartbeat via an electronic receiver. The number of beats is cross-referenced with the person’s various heart rate training zones. Based on the heart rate zone the individual is in and his personal information, the heart rate monitor estimates the energy consumption of the exercise.