Yes. Your body burns calories whether you are sleeping, resting, sitting, walking or working out. Our All Day Calorie meter accounts for all these calories burned. The fitness tracker calculates the number of calories burned during physical activity and daily living. In fact, the LifeTrak Zone C410 uses activity monitoring, your heart rate, and your personal statistics to provide accurate calorie burn. Taking regular heart rate readings improves the accuracy of your daily calorie burn.