Actigraph GT3X+

Instrument Details

Actigraph GT3X+

Actigraph GT3X+

Physical activity assessment objective

Accelerometer

14th April 2022

Antonia Smith, 

Triaxial accelerometer. Microelectro-Mechanical-System (MEMS) sensor. Records accelerations with a dynamic range of ±6 g. Data sampling frequency of 30-100Hz, based on higher internal raw sampling frequency. The device also collects ambient light data in Lux at a sampling rate of 1Hz. The GT3X+ weighs 19g and its dimensions are 4.6 x 3.3 x 1.5 cm. The GT3X+ is the successor to the GT3X.

Instrument Characteristics
acquisition  -> Device
retrospective prospective  -> Prospective
timeframe  -> Weeks
location  -> Waist
location  -> Hip
location  -> Wrist
timeseries  -> Yes
raw aggregated  -> Raw
opensource proprietary  -> Proprietary
raw sampling  -> 20 ms
resolution  -> 20 ms
Instrument Estimates
Duration
Intensity
Frequency
Volume
Total physical activity energy expenditure
Type
Posture
Sedentary behaviour
Behaviour pattern: Timing
Behaviour pattern: Bouts
Behaviour pattern: Variability