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Problem Possible cause Solution
Blood ow in the skin can
be temporarily reduced
when going outside when it
is very cold as more blood is
directed to the body’s core.
Try wearing long-sleeved clothing
to cover the watch and starting
the measurement inside. Disregard
inaccurate measurements during
the rst couple of minutes and
provide some time for the blood
ow to the skin to adjust to the
exercising conditions.
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