Fitbit Allows You to Set Custom Heart Rate Zones. Do You
https://blog.fitbit.com/max-heart-rate/
Apr 12, 2017 . If you own a Fitbit Alta HR, Fitbit Charge 2, Fitbit Blaze, or Fitbit Surge and have entered your birthday into your profile, you’ve probably noticed a colorful bar graph pop up in your workout summaries. This chart tracks how much time you spent in each heart rate zone —ranges that represent a percentage of your max heart rate and correspond to different exercise …
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