By A Mystery Man Writer
When's the last time you measured your pulse? It can give you vital information about your heart health.
Solved: Low Resting Heart Rate (too Low?) Fitbit Community, 55% OFF
Composite Heart Rate: Health and Fitness Metrics - FasterCapital
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Composite Heart Rate: Health and Fitness Metrics - FasterCapital
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Instant Heart Rate: HR Monitor on the App Store
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How to track your heart rate with only your smartphone - CNET