Jul 6, 2014 8:40 AM
If your cardio workouts aren't yielding the results you were hoping for, perhaps it's because you're not being tough enough on yourself. There's only one way to know whether your exercise is actually getting the job done: monitoring your heart rate. The Polar FT1 ($70) shows just how much you're moving with big digital text. By seeing that number, you'll have the motivation you need to keep the pace up and burn those calories.
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