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Target Heart Rate
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When you exercise, your body speeds up, and so does your heart as it works to meet your increased energy needs. But how much speeding-up of your heart is safe when you exercise? You need the answer to this question in order to maximize your exercise benefits while not overworking your heart.
Your target heart rate isn't one rate but a range of rates (beats per minute, or bpm), expressed as percentages of your maximum heart rate, that are safe for you to reach during exercise. For most healthy people, the American Heart Association recommends an exercise target heart rate ranging from 50% to 75% of your maximum heart rate, which is normally calculated as the number 220 minus your age.
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