Table 2 Description of the accelerometers/inclinometers reported in articles included in the systematic review
From: Validity of objective methods for measuring sedentary behaviour in older adults: a systematic review
Brand and model | Studies in which assessed | Placement of monitor in reviewed studies | Type of monitor | Output available |
|---|---|---|---|---|
ActiGraph GT3X+ (ActiGraph LLC, Fort Walton Beach, FL, USA). | Hip, waist, thigh, ankle, wrist | Triaxis accelerometer using piezoresistive and capacitive technology | Activity counts from acceleration signals in vector axis only or in vertical magnitude, a composite measure using the three axes; raw-mode output allows for post-data collection filtering [63]. Filtering and choice of epoch time is done after data collection. Offers a low-frequency extension (LFE) filter, designed to better capture low-intensity activities like sedentary behaviour than the normal filter. | |
ActiGraph GT3X (ActiGraph LLC, Fort Walton Beach, FL, USA). | [32] | Hip, waist, thigh, ankle, wrist | Triaxis accelerometer using piezoresistive and capacitive technology | Activity counts from acceleration signals in vector axis only or in vertical magnitude, a composite measure using the three axes. Filtering and choice of epoch time must be set before data collection. Offers a low-frequency extension (LFE) filter, designed to better capture low-intensity activities like sedentary behaviour than the normal filter. |
ActiGraph 7164 (ActiGraph LLC, Fort Walton Beach, FL, USA). | Hip | Uniaxis accelerometer using piezoelectric technology | Activity counts that are filtered, digitized and full-wave rectified from acceleration signals in vector axis [63]. Filtering and choice of epoch time must be set before data collection. | |
Actical (Mini Mitter Respironics, Inc., Bend, OR, USA) | [37] | Waist | ‘Omni-directional’ accelerometer using piezoresistive and capacitive technology; most sensitive to motion in one plane | Activity counts that are filtered and digitized from acceleration signals |
activPAL (PAL Technologies Ltd., Glasgow, Scotland) | [38] | Thigh | Uniaxis accelerometer using capacitive technology | Classifies activities as sitting/lying, standing or walking |
activPAL3 (PAL Technologies Ltd., Glasgow, Scotland) | [38] | Thigh | Triaxis accelerometer using capacitive technology | Classifies activities as sitting/lying, standing or walking |
GENEActiv (Activinsights Ltd., Kimbolton, UK) | [39] | Thigh | Triaxis accelerometer with a near-body temperature sensor | Raw-mode data allows for open-source post-data collection filtering |
MotionWatch8 (CamNtech, Cambridge, UK) | [40] | Wrist | Triaxis accelerometer using MEMs technology, with ambient light sensor | Activity counts from acceleration signals in a single axis only or in vertical magnitude using epoch-based recoding that uses the three axis; raw-mode data allows for post-data collection filtering |