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Apps and features
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The accuracy of the heart rate sensor may be reduced depending on measurement
conditions and surroundings.
•
Use the HR feature only for measuring your heart rate.
•
Cold ambient temperatures may affect your measurement; during winter or cold
weather keep yourself warm when checking your heart rate.
•
Smoking or consuming alcohol before taking measurements may cause your heart
rate to be different from your normal heart rate.
•
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 wear the device on your inner
arm so that the sensor is in contact with your skin.
•
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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