Beat by beat: Can you rely on heart-rate monitors?

Heart-rate monitors are commonly worn by athletes but how accurate are the readings, asks Peta Bee.

Beat by beat: Can you rely on heart-rate monitors?

Heart-rate monitors are commonly worn by athletes but how accurate are the readings, asks Peta Bee.

WHEN was the last time you checked your heartbeat? Heart-rate monitors are no longer used just by Olympians and elite athletes.

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