The really cool part was that each child wore an actigraph
, or a small watch-sized computer that measured their movements at night for several weeks, so that we knew down to the minute how much they were sleeping--and how long it took for them to put themselves back to sleep if they awoke.
Agreement between activPAL and ActiGraph
for assessing children's sedentary time.
They include the Actigraph
(Pensacola, Florida); DynaPort (McRoberts; Den Haag, the Netherlands); StepWatch Activity Monitor (SAM) (Orthocare Innovations; Mountlake Terrace, Washington); RT3 (Stayhealthy Inc; Monrovia, California); and SenseWear Armband (BodyMedia Inc; Pittsburgh, Pennsylvania), a multisensor monitor [1,3,5,7,14-18].
99 with 'gold standard' ActiGraph
sensors, for instance.
An average of five nights of objective sleep data were collected from each participant using a wrist actigraph
After my second visit to the sleep specialist (during which we analyzed the results of an actigraph
test that recorded my rest/activity cycles round the clock), I felt much more confident that I was on the path to sleeping better.
Objective physical activity levels, including both movement and intensity of activity, were also measured using the ActiGraph
GT3X+ accelerometer (ActiGraph
, LLC; Pensacola, FL).
All students in the elementary sample wore ActiGraph
GT1M biaxial accelerometers, which were placed on the right hip by their PE teachers.
Physical activity (PA) was measured objectively using the ActiGraph
[R] accelerometer (Model GT3X: ActiGraph
, Pensacola, FL) at 3 and 6 weeks and 3 and 6 months post-surgery.
for long-term tremor recording, Movement Disorders 21: 1136-1143.
We believe that our community-based exposure measurements are more accurate and our confounding controls are as good or better than those used in previous investigations, which often relied on ambient pollutant monitoring at central sites and lacked actigraph
physical activity data.
Therefore, the purpose of this study was to determine the agreement between an ActiGraph
accelerometer and PAtracker (direct observation) for characterizing PA intensity, and between the PAtracker and a daily PA log (self-report) for characterizing body position and PA type in the BCT environment.