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/cdn3.vox-cdn.com/uploads/chorus_asset/file/2447680/DSCF5750.0.jpg "Fitness trackers aren't very accurate at measuring heart rate — and that can be dangerous - The Verge")
Fitness trackers aren't very accurate at measuring heart rate — and that can be dangerous - The Verge
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![Comparison of Polar H10, Fitbit Charge 2, and Garmin Forerunner 235 HR Data During Run [OC] : r/dataisbeautiful](https://preview.redd.it/qa87hv5r1zy11.png?auto=webp&s=3c228b61ec39492c5af2b50ddf00f71329028eb5 "Comparison of Polar H10, Fitbit Charge 2, and Garmin Forerunner 235 HR Data During Run [OC] : r/dataisbeautiful")
Comparison of Polar H10, Fitbit Charge 2, and Garmin Forerunner 235 HR Data During Run [OC] : r/dataisbeautiful
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