Module No. 3515
Fastening the Watch to Your Wrist
Correctly wearing the watch on your wrist is essential to obtain accurate heart rate, breathing exercise, and sleep measurements. Especially when using the watch while running or performing other strenuous exercises, make the adjustments described below to ensure that the watch does not shake or shift.
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With the watch fastened loosely on your wrist, place at least one finger to the right of the watch* (Figure).
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Position the watch so there is at least one finger width between it and the bone that protrudes from the side of your wrist (Figure).
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After you determine the best wrist position for the watch, tighten the band securely enough to keep the watch from sliding on your wrist.
* If you wear the watch on your right wrist, place your finger(s) to the left of the (C) button (left side of the watch).
The location and shape of this bone (circled in the illustration) differ from person to person.
Important!
A band that is snugly tightened for heart rate or other measurements can make it difficult for air to pass under the band and cause you to sweat, which can lead to skin irritation. After measuring your heart rate, loosen the band enough so you can insert a finger between it and your wrist.
Wearing the watch for long periods, sweat, or certain usage environments create the risk of skin rash. To prevent skin problems, regularly remove your watch from your wrist to give your skin some time to rest.
The watch is not fastened correctly to your wrist if you can see green light coming out from behind the watch.
Keep your arms still during breathing exercise measurement.
For details about how to wear the watch during blood oxygen level measurements, see the information below.