Using health management 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.
Please 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 for
30 minutes 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 strap 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, remove it until it cools. Exposing skin to a
hot surface of the device for a long time may cause skin burn.
