Adidas micoach - Wearing Your FIT SMART

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2.2.2 Wearing your FITSMART
To ensure proper data tracking during your activities, fasten your FITSMART snugly around your wrist so that the optical sensor on the back of the device makes tight contact with
your skin and movement of the device during the workout is avoided. You want it to be close-fitting, but not too tight. Wear your FITSMART away from your wrist bone, not directly
on it. If you have small wrists, wear it higher up on your forearm.