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2. Do not wear your tracker too tight; a tight band restricts blood flow,
potentially affecting the heart rate signal. That being said, the tracker should
also be slightly tighter (snug but not constricting) during exercise than during
all-day wear.
3. With high-intensity interval training or other activities where your wrist is
moving vigorously and non-rhythmically, the movement may prevent the
sensor from finding an accurate heart rate. Similarly, with exercises such as
weight lifting or rowing, your wrist muscles may flex in such a way that the
band tightens and loosens during exercise. Try relaxing your wrist and staying
still briefly (about 10 seconds), after which you should see an accurate heart
rate reading.
Specifying dominant or non-dominant hand
To improve the accuracy of your Fitbit Surge, we ask you to specify whether you’re
wearing it on your dominant or non-dominant hand. Your dominant hand is the one
you use for most day-to-day activities such as writing or brushing your teeth. You
can specify this setting in the Fitbit app or in the fitbit.com dashboard.
To make this choice using the fitbit.com dashboard:
1. Log in to fitbit.com.
2. Click the gear icon in the top-right corner of the dashboard and select
Settings.
3. Using the navigation tabs on the left, find and specify the correct setting for
Dominant Hand.
4. Sync your Fitbit Surge to update your tracker with the new setting:
a. Click the Fitbit Connect icon near the date and time on your computer.
b. Make sure your Fitbit Surge is nearby and click Sync Now.
Using your Fitbit Surge in wet conditions
Your Fitbit Surge is splash-proof, rain-proof, and can withstand even the sweatiest
workout. Your Fitbit Surge is not designed to be worn swimming. We also
recommend removing your tracker before showering. Though the device can
withstand the water exposure, wearing your tracker 24/7 does not allow your skin to
breathe. After getting your tracker wet, dry it thoroughly before putting it back on.
For more details, see https://www.fitbit.com/productcare.
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