Citizen Systems TW610 What is an amount of exercise?

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What is an amount of exercise?
Amount of exercise (Ex) refers to the
unit indicating the amount of physical
activity. To prevent lifestyle diseases, you
are recommended to actively engage in
a minimum of 23 Ex physical activities
(exercise and daily activities) a week. It
is also recommended that you check with
the guideline by the health authority in your
area.
Amount of exercise (Ex) = Intensity of
physical activities (METs) x Time (hr).
Intensity of physical activities (METs)
multiplied by duration (hr) of physical activity
makes an amount of exercise (Ex).
METs = Metabolic Equivalents, the unit
of intensity of physical activities
The unit for expressing the “intensity of
physical activities” by the multiplication
equivalent to the counterpart during rest.
Normal walking is equivalent to 3 METs.
This product indicates the amount of
exercise (Ex) by the number of steps.
Reference)
Normal walking (3 METs) x 1 hour = 3 Ex
Fast walking (4 METs) x 1 hour = 4 Ex