A 3-axis accelerometer (wGT3X-BT, Actigraph) was used to measure and record movement during sleep. Participants were instructed to wear the accelerometer on the non-dominant wrist during sleep for 7 days. The movement data during sleep were used to determine sleep efficiency, wake time after sleep onset, the number of awakenings per night, sleep onset latency, total sleep time, and average wake time per awakening. The ActiLife version 6.11.7 software was used to analyze the sleep data extracted from the accelerometer. As one of the major confounding factors in this study, habitual physical activity level was assessed before and after the intervention. The ActiGraph accelerometer (wGT3X-BT, ActiGraph, United States), which has been previously validated (Plasqui and Westerterp, 2007 (link)), was used to measure the habitual physical activity. Participants were instructed to wear the ActiGraph watch on the non-dominant arm for 7 days. The physical activity data were processed using ActiLife version 6.11.7 software to measure the time spent in sedentary activities, light-intensity activities, moderate-intensity activities, vigorous-intensity activities, and very vigorous-intensity activities.
Wgt3x bt
Manufactured by ActiGraph
Sourced in United States
The ActiGraph wGT3X-BT is a compact, lightweight accelerometer-based activity monitor designed for objective physical activity and sleep assessment. It captures and records movement data that can be used to analyze activity levels and patterns.
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Lab products found in correlation
Actilife 6, by ActiGraph (17 mentions)
Actilife software, by ActiGraph (6 mentions)
Actilife software version 6, by ActiGraph (5 mentions)
Actilife, by ActiGraph (4 mentions)
Actitrainer, by ActiGraph (4 mentions)
Wactisleep bt, by ActiGraph (3 mentions)
Actilife v 6, by ActiGraph (3 mentions)
Wgt3x bt activity monitor, by ActiGraph (3 mentions)
Sleep analysis, by ActiGraph (3 mentions)
Afinion 2, by Abbott (1 mentions)
Matlab, by MathWorks (1 mentions)
213 portable stadiometer, by Seca (1 mentions)
Mbca 514, by Seca (1 mentions)
Wgt3x, by ActiGraph (1 mentions)
Carescape v100, by GE Healthcare (1 mentions)
Spss software version 26, by IBM (1 mentions)
Activpal micro, by PAL Technologies (1 mentions)
Polar h10, by Polar Electro (1 mentions)
Accelerometer, by ActiGraph (1 mentions)
Oxycon mobile, by BD (1 mentions)
241 protocols using wgt3x bt
1
Accelerometer-based Sleep and Activity Assessment
2
Validating Wearable Devices for Physical Activity
3
Actigraph-Based Physical Activity Monitoring in CP
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Physical activity information was collected using the ActiGraph wGT3X-BT (ActiGraph, Pensacola, FL), a 4.6×3.3×1.5-cm wireless, tri-axial accelerometer with a dynamic range of ±8 gravitational units at a sampling rate of 30 Hz. The selection of the ActiGraph wGT3X-BT model was underpinned by its documented reliability and validity in previous studies involving ambulatory individuals with CP [10 (link), 12 (link)]. Vector magnitude average counts (VMA) and VMA ratios were used as actigraphy variables. The VMA was calculated by adding the activity counts in all three axes, while the VMA ratio was determined by computing the natural logarithm (ln) of the ratio between the affected side VMA and less-affected side VMA (ln [affected side VMA/less-affected side VMA]). Acceleration data were downloaded and converted into 10-s epochs using ActiLife 6 software (ActiGraph, Pensacola, FL) and subsequently into activity counts.
4
Triaxial Accelerometer-Based Physical Activity Assessment
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It will be objectively measured by a triaxial accelerometer (Actigraph wGT3X-BT, Actigraph, Pensacola, FL, USA). The Actigraph wGT3X-BT will be initialized in a specific software (ActiLife v6.13.3) to collect data with a 60-hz sample rate. Participants will be instructed to wear the device on the waist (with an elastic belt) for 7 consecutive days. They should remove it only to perform water activities (i.e., showering) and sleep. This equipment provides as main variables the number of steps per day, time spent (in minutes and percentage of the day) in sedentary activities (<100 counts per minute), light-intensity PA (100–1951 counts per minute), and moderate to vigorous PA (≥1952 counts per minute) [20 (link)].
5
Tri-Axial Accelerometer Wear Time Protocol
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The participants were instructed by trained personnel to wear the triaxial accelerometer (Actigraph wGT3X-BT, Pensacola, FL, USA) on their left hip for seven consecutive days, except when bathing, swimming, and sleeping. The Actigraph wGT3X-BT used in this study has been well examined for validity and accuracy (19 (link), 20 (link)). Participants with a minimum of 4 valid days and the wear time of ≥10 h per day were included in the analyses (21 (link)). We used ActLife 6.13.4 to read and analyze 60-s epoch data. Non-wear time was defined as a minimum of 90 consecutive min of zero intensity counting without a maximum of 2 min of counting from 0 to 100. LPA was defined as 100–1,951 counts/minute (CPM), and MVPA was defined as ≥1,952 CPM. Bouted LPA and MVPA were defined as ≥10 consecutive min, allowing up to 2 min out of 10 to fall below the intensity threshold for LPA or MVPA. Sporadic LPA and MVPA as any accumulation of LPA or MVPA in <10 min. To derive an estimate of the time (minutes) spent in bouted LPA, sporadic LPA, bouted MVPA, and sporadic MVPA per day, values were averaged over the number of valid days.
6
Objective Physical Activity Monitoring
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In a sub‐sample (n = 2505), we used the triaxial accelerometer (ActiGraph wGT3X‐BT, ActiGraph LLC, FL, USA) to objectively document participant's physical activity and sedentary behavior over seven consecutive days.37 Participants wore an ActiGraph wGT3X‐BT triaxial accelerometer on their hip, affixed to an elastic belt, during all waking hours for seven consecutive days, and removed it only for swimming or bathing. Parameters include raw acceleration (G's), activity counts, energy expenditure, metabolic equivalents rates (METs), steps taken, intensity of physical activity, activity bouts, sedentary bouts, and body position.
7
Observation of Self-Directed Physical Activities
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Participants were observed by a researcher for up to 45-min during self-directed activities to be consistent with the amount of time offered in a PT session. The median session time for self-directed activities was 39.0 min (Interquartile range: 30.0, 42.9). The observation session was scheduled based on participant preference and to minimize sedentary activities (i.e. sleeping) in order to avoid any potential analytical bias of the Actigraph wGT3x-BT towards greater agreement.
Step counts were simultaneously obtained using the Actigraph wGT3x-BT and hand tally counter in an identical manner to the PT session.
Step counts were simultaneously obtained using the Actigraph wGT3x-BT and hand tally counter in an identical manner to the PT session.
8
Accelerometry-Based Physical Activity Monitoring
9
Accelerometry-Based Physical Activity Assessment
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Subjects were instructed to wear triaxial accelerometer (wGT3X-BT, Actigraph, USA) for seven consecutive days using an elastic band at the waist of the non-dominant leg. The accelerometer was worn during all activities, excluding showering, swimming and sleeping. Wear time was manually verified using daily diaries on shower and bed times. Counts were sampled at 30 Hz and stored in 60 s epochs to determine counts per minute (CPM). Two weekend days and three weekdays were used for data analysis. Percentage of wear time in sedentary (SPA), light (LPA) and moderate to vigorous physical activity (MVPA) was determined using the cutoffs provided by Troiano et al., being 0–99 CPM, 100–2019 CPM and 2020–∞ CPM respectively (Troiano et al. 2008 (link)). Activity kcals per day were calculated using the counts from all axis according to the Freedom VM3 equation (Sasaki et al. 2011 (link)).
10
Measuring Energy Expenditure and Physical Activity
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Energy expenditure and physical activity will be measured at 0, 3 and 12 months, by two methods:
Using an accelerometer (Actigraph wGT3x-BT), worn at the waist using an elastic belt during seven consecutive days, from morning to bedtime, to measure the total weekly energy expenditure in MET-min/week, the total time spent in moderate (between 3.75 and 7.49 MET-min) and high intensity (> 7.5 MET-min) physical activities; The default energy expenditure during the time when the accelerometer is not worn will be 1 MET-min.
Using the self-administered International Physical Activity Questionnaire (IPAQ) [29 ], short version, covering the past seven days, to measure the weekly energy expenditure in MET-min/week.
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