Widgets and features
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The accuracy of the heart rate sensor may be diminished depending on
measurement conditions and surroundings.
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Use the HR feature only for measuring your heart rate.
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Do not look directly at the heart rate sensor’s lights. Doing so may impair your
vision. Make sure children do not look directly at the lights.
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Cold ambient temperatures may affect your measurement; during winter or cold
weather, keep yourself warm when checking your heart rate.
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Take heart rate measurements when you are seated and relaxed. Do not move your
body while taking heart rate measurements. Doing so may cause your heart rate to
be recorded inaccurately.
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If you receive a reading that is very different from your expected heart rate, rest
and then measure again.
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Smoking or consuming alcohol before taking measurements may cause your heart
rate to be different from your normal heart rate.
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Do not talk, yawn, or breathe deeply while taking heart rate measurements. Doing
so may cause your heart rate to be recorded inaccurately.
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Because the heart rate sensor uses light to approximate heart rate, its accuracy
may vary due to physical factors that affect light absorption and reflection, such as
blood circulation/blood pressure, skin condition and location and concentration of
blood vessels. In addition, if your heart rate is extremely high or low, measurements
may be inaccurate.
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Users with thin wrists may receive inaccurate heart rate measurements when
the device is loose, causing the light to be reflected unevenly. If heart rate
measurement is not working properly, adjust the position of the device’s heart rate
sensor to the right, left, up, or down on your wrist, or turn the device so the heart
rate sensor sits firmly against the inside of your wrist.
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If the heart rate sensor is dirty, wipe the sensor and try again. Obstructions
between the device’s band and your wrist, such as body hair, dirt, or other objects
may prevent the light from reflecting evenly. Please make sure you remove such
obstructions before use.
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If your device becomes hot to the touch, please remove it until it cools. Exposing
skin to a hot surface of the device for a long time may cause skin burn.
