Heart Health
Listen to your heart
Knowing your heart rate at any time is easier than ever. What are the best ways to use this instant information?
There are many ways to track your heart rate nowadays, from fitness watches such as Garmin and Apple to activity trackers.
These devices use photoplethysmography sensors to measure your pulse. A light on the watch or tracker’s underside shines onto the skin of your wrist and refracts off the blood flowing beneath. A sensor then translates that information into a pulse reading.
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About the Author
Matthew Solan, Executive Editor, Harvard Men's Health Watch
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