My Fitbit Air test revealed the flaws of calorie counting with a health tracker - here's why - ZDNET

My Fitbit Air test revealed the flaws of calorie counting with a health tracker - here's why - ZDNET
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Nina Raemont/ZDNET Follow ZDNET:Β Add us as a preferred sourceΒ on Google. ZDNET's key takeaways
  • I tested theΒ Fitbit Air's heart rate data.Β 
  • I compared it against the Polar H10 chest… [+7448 chars]

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