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Jocelyn F. Hafer, Mark S. Miller, Jane A. Kent and Katherine A. Boyer

. Participants wore accelerometers (GT3X; ActiGraph, Pensacola, FL) at the hip for at least 5 days (including at least 1 weekend day). Weekly time spent in MVPA 43 and weekly activity counts were determined for all participants. Gait analyses were performed from data collected during walking overground at 1.4 m

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Benita J. Lalor, Shona L. Halson, Jacqueline Tran, Justin G. Kemp and Stuart J. Cormack

the participant was lying down attempting to sleep or activity counts from the monitor were sufficiently low to indicate that the participant was immobile (ie, where the weighted activity count for an epoch fell below the defined threshold). When these 2 conditions were satisfied simultaneously, time

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Rachel G. Curtis, Dorothea Dumuid, Timothy Olds, Ronald Plotnikoff, Corneel Vandelanotte, Jillian Ryan, Sarah Edney and Carol Maher

accelerometers (Activinsights Ltd, Kimbolton, United Kingdom) that participants were asked to wear the accelerometer on their left wrist for 24 hours per day for 7 days, except during water-based activities. Acceleration was measured at 50 Hz, and activity counts were measured in 60-second epochs. When

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Marcin Straczkiewicz, Jacek Urbanek and Jaroslaw Harezlak

, QLD, Australia Brønd , J.C. , & Arvidsson , D. ( 2016 ). Sampling frequency affects the processing of Actigraph raw acceleration data to activity counts . Journal of Applied Physiology, 120 ( 3 ), 362 – 369 . PubMed ID: 26635347 doi:10.1152/japplphysiol.00628.2015 10.1152/japplphysiol.00628

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Alex V. Rowlands

’s Accelerometry Database (ICAD). Daily accelerometer-measured physical activity [counts per minute (cpm)] was matched to local weather conditions and the relationships assessed using multilevel regression models. Multilevel models accounted for clustering of days within occasions within children within study

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Xihe Zhu and Justin A. Haegele

with oxygen consumption ( Kelly, McMillan, Anderson, Fippinger, Fillerup, & Rider, 2013 ). The ActiGraph GT3x output represents data across three axes (mediolateral, vertical, and anteroposterior) separately and provides activity counts as a composite vector magnitude of these three axes. This specific

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Jacopo A. Vitale, Giuseppe Banfi, Andrea Galbiati, Luigi Ferini-Strambi and Antonio La Torre

threshold was selected to detect sleep parameters since it has been shown that the cutoff value of 80 activity counts yields the best combination of sensitivity and specificity in a population of elite athletes. 12 Together with the actigraph, each subject received a sleep diary to record bedtime, wake

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Amber Watts, Mauricio Garnier-Villarreal and Paul Gardiner

vigorous physical activity. Both inadequate physical activity and prolonged sitting may confer independent harms. Estimates of sedentary behavior are often inferred from low levels of physical activity (e.g., <100 activity counts per minute as measured by accelerometry); however, accurate assessment of

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Alberto Flórez-Pregonero, Matthew S. Buman and Barbara E. Ainsworth

into measures of metabolic equivalents (METs) expenditure that reflect thresholds (cut-points) for specified levels of activity ( Watson, Carlson, Carroll, & Fulton, 2014 ). Cut-points are numerical values for the acceleration of movement intensity (activity counts) that reflect thresholds in the

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Hotaka Maeda, Chris C. Cho, Young Cho and Scott J. Strath

extremely long computing time in comparison to the other methods. Therefore, the results for Lee and Gill’s method may be less stable than the other methods. Methods to Estimate Activity Average Counts per Day The average activity counts per day from the original 7-day data were considered to be the true