A. Your heart rate tells you how hard you're working—and how much you'…
A. Your heart rate tells you how hard you're working—and how much you're getting from your effort. If you're new to exercise or just looking to maintain your weight, aim to walk at 50 to 60 percent of your maximum heart rate for at least 30 minutes or the duration of the workout. Crank up the intensity so you're between 60 and 70 percent of your maximum heart rate to get into the fat-burning zone. To find your maximum heart rate, subtract your age from 220. Take that number and multiply it b…
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