I'm sorry, but, how does the heart produce oxygen? You kind of lost me after that
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You need to be still when taking a reading.
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The same day that came out, a reported stated that heart monitor watches could be off as much as 20 to 40 bpm. (Movement and sweat)
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Pulmonary emboli obstruct blood flow in the lungs diminishing oxygen exchange and transport causing the heart to work harder to compensate.
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@fitbit come to Brazil!!!Thanks. Twitter will use this to make your timeline better. UndoUndo
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