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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")
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/cdn.vox-cdn.com/uploads/chorus_asset/file/15788331/fit_bit_triplets-2130.0.1510520683.jpg "Three New Fitbits: See How They Run - Vox")
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