Fitbit charge hr and heart rate

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I've worn my new charge hr for 2 Zumba classes so far and I can't get my heart rate above 128! And yes, I am putting forth a lot of effort. I am an instructor so I know my hr will be lower then most, but 128???? I'm afraid I'm wearing the band wrong or my wrist is to skinny. Anyone else having this issue? Thinking ab borrowing someone's HR monitor with a chest strap to try and compare them!!

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  • FrancisCV7
    FrancisCV7 Posts: 123 Member
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    There might be a slight difference between the heart rate monitors you use, but pretty much your body has reached a level where your heart just doesn't have to pump as hard
  • lukemccoy1
    lukemccoy1 Posts: 3 Member
    edited January 2015
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    In this review he compares the heartbeat data from it vs a chest strap. It also never gets over 120. That's one of the reasons I decided to get the Charge HR instead of the Surge and continue using my chest strap during workouts.