Heart Rate Monitoring during exercise will... Remind you when you're slacking - or pushing too hard. Allow you to exercise safely Show progress that doesn't register on any weigh scale. Can accurately track calorie 'burn' Give real, accurate feedback that may be different from your 'perceived exertion.' How does it work? Actually very little equipment is required. Modern monitors may be a combination of a chest strap that records the heart rate and a wristwatch which...