Study questions accuracy of fitness trackers - KMOV.com

Study questions accuracy of fitness trackers

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A study questions how accurate fitness trackers are at monitoring heart rate (Credit: CBS News). A study questions how accurate fitness trackers are at monitoring heart rate (Credit: CBS News).

(KMOV.com) - Millions of Americans use fitness trackers worn on their wrist.

But CBS correspondent Kenneth Craig reports a new new study questioning just how accurate the fitness trackers really are at monitoring your heart rate. 

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