User manual

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 Make sure the watch is in contact with your skin.
 Don’t wear your watch too tight; a tight band restricts blood flow, potentially
affecting the heart-rate signal. However, the watch should be slightly tighter
(snug but not constricting) during exercise than during all-day wear.
 With high-intensity interval training or other activities where your wrist is
moving vigorously and non-rhythmically, the movement may limit the sensor’s
ability to provide a heart-rate reading. If your watch doesn’t show a heart-rate
reading, try relaxing your wrist and staying still briefly (about 10 seconds).
Then you should see a heart-rate reading.
Wrist
For greater accuracy and ease of use, Ionic needs to know if you wear it on your
dominant or non-dominant hand. Your dominant hand is the one you use for writing
and eating. If you decide to move Ionic to the other wrist, change the Wrist setting in
the Fitbit app.