<human>: Is there any way I can tell how many calories I'm burning when I work out?
<bot>: Yes, you can use a heart rate monitor to track your calorie burn while working out. Heart rate monitors measure the number of times your heart beats per minute (BPM) and then calculate the amount of energy you are burning based on that information. This is an accurate method for measuring your caloric expenditure during exercise because it takes into account the intensity level of the workout.