Wearing The Device; Miscellaneous Device Information; Degradable Components; Other Possible Negative Effects - ActiGraph wGT3X-BT User Manual

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Wearing the Device

All ActiGraph activity monitors are designed to monitor human activity and record energy expenditure
(calories spent during normal activity, METs, everyday activity, and exercise). Additionally, these devices
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can also function as a very accurate sleep assessment tool . While collecting day-to-day energy
expenditure data, the device should be affixed securely to the body's center-of-mass to ensure the most
accurate caloric measurements. Wrist worn (non-validated) EE for kids is now available for 3-axis
ActiGraph devices. When being used for sleep assessment, ActiGraph devices may be worn anywhere on
the body: wrist, waist (hip), arm, or ankle.
It is recommended that children under 12 years of age wear ActiGraph devices on the elastic belt (versus
the adhesive belt clip) as it is the most secure way to wear the device. Belt loop pouches, wrist and
ankle straps are also available.
If irritation of the skin occurs due to wearing the device, discontinue wearing the device and consult a
doctor for treatment. Although the Polycarbonate and Polyvinyl Chloride materials are not known to be
irritating to the skin, some irritation to individuals with sensitive skin may occur. If this happens, consult
your doctor for treatment and stop wearing the device. Also, notify the individual that issued the device
to you that you have taken the device off since data collection will be effected.

Miscellaneous Device Information

Degradable Components

ActiGraph's devices are made with high quality components that are not subject to deterioration over
time. The battery within each device is the only component that has a determined life expectancy (5
years). If a device seems to be under-performing, call ActiGraph's Customer Service department
immediately so the problem may be resolved. Batteries are only to be changed by ActiGraph trained
personnel.

Other Possible Negative Effects

Pets have the potential to destroy a device. Keep devices away from pets and other animals that may
chew on, bite, urinate on, swallow, and destroy a device in any other method imaginable.

Wear Locations

ActiGraph's devices can be worn in 6 different locations; the ankle, thigh, in a pants pocket, on the
waist, wrist, or on a lanyard around the neck. When initializing the wGT3X-BT device within ActiLife,
choose the appropriate wear location to ensure accurate data collection.
Sleep analysis can also be performed by purchasing ActiGraph's ActiSleep analysis program, which is part of the Virtual
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Trainer, web-based, analysis software. Formulas for this tool were developed by Dr. Avi Sadeh. Department of Psychology,
Tel Aviv University.
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