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" Walking is definitely a workout: you break a sweat, you breathe a little harder, you feel invigorated\u2014and hopefully you burn enough calories to see a difference on the scale. But how can you tell if you&amp;#039;re working hard enough\u2014or too hard\u2014to get the most out of your walk? Use a heart rate monitor, says Annie Glussman, a personal trainer at The Sports Club/LA in New York City. It monitors your pulse during exercise to determine whether you&amp;#039;re within your target window: If your heart rate is too high, you&amp;#039;re overdoing it and will wear out quickly, which will force you to cut your workout short; but if it&amp;#039;s too low, you&amp;#039;re not pushing hard enough to get the most calorie burn for your time. &amp;quot;It&amp;#039;s a great tool to invest in because it keeps you honest,&amp;quot; says Glussman.  Our top picks:  Polar FS1 Heart Rate Monitor  ($59.95; polarusa.com), which is easy to use and perfect for beginners. Cardio Sport GO 20 Heart Rate Monitor for Women ($99.99; amazon.com), which is specially designed to fit smaller wrists. Garmin Forerunner 301 ($214.27; garmin.com), which offers free online access to Garmin Training Center\u00AE software that lets you track your pace, time, distance, and heart rate to analyze past walks and plan future ones. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.redbookmag.com/body/health-fitness/advice/a2009/heart-rate-monitor/>