Actigraph GT1M

Instrument Details

Actigraph GT1M

Actigraph GT1M

Physical activity assessment objective


7th March 2022

Soren Brage, University of Cambridge

Biaxial accelerometer (original firmware disabled one axis and the device was thus launched as a uniaxial accelerometer). MEMS sensor. Raw sampling frequency 30Hz. Data stored as axis-specific counts over user-defined epoch period. These data are filtered by digital algorithms in firmware to emulate the response of its predecessor, the analogue Actigraph 7164.

Instrument Characteristics
location  -> Waist
location  -> Hip
timeseries  -> Yes
raw aggregated  -> Aggregated
opensource proprietary  -> Proprietary
raw sampling  -> 40 ms
resolution  -> 15 s