Modern running watches not only determine the distance covered, speed and heart rate but, through built-in GPS, can also create and track accurate routes. Training plans and analyses can be made on your computer or the App, then sent to the watch. Heart rate can be measured via the classic chest strap, which is more accurate, or via optical-electrical measurement directly on the wrist under the watch, which athletes often find more convenient.
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Running Watches & Chest Belts
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