Polar Flow App setting up heart rate zones, the vibration function to help you stay in the zone and annotating heart rate traces
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zone class - are you working hard or hardly working? - Banks O' Dee Sports & Fitness Gym in Aberdeen
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Amazon.com : Polar H10 Heart Rate Monitor Chest Strap - ANT + Bluetooth, Waterproof HR Sensor for Men and Women (NEW) : Sports & Outdoors
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