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Neng Wan, Ming Wen, Jessie X. Fan, O. Fahina Tavake-Pasi, Sara McCormick, Kirsten Elliott and Emily Nicolosi

.4278/0890-1171-10.4.282 10159709 42. Carlson RH Jr , Huebner DR , Hoarty CA , et al . Treadmill gait speeds correlate with physical activity counts measured by cell phone accelerometers . Gait Posture . 2012 ; 36 ( 2 ): 241 – 248 . PubMed doi:10.1016/j.gaitpost.2012.02.025 10.1016/j.gaitpost.2012.02.025 22475727

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Barbara Resnick, Elizabeth Galik, Marie Boltz, Erin Vigne, Sarah Holmes, Steven Fix and Shijun Zhu

). Prior evidence of reliability of the MotionWatch 8 was based on the consistency between recordings across 3 days of wear. Evidence of validity of the MotionWatch 8 was based on a consistent match between the activity counts and recorded activity performed and a statistically significant difference in

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Kent A. Lorenz, Hans van der Mars, Pamela Hodges Kulinna, Barbara E. Ainsworth and Melbourne F. Hovell

measure the behavioral variables while simultaneously recording PA. 22 Table 2 Interobserver Correlation Coefficients and R 2 Values for Physical Activity Counts Girls Boys Intensity r R 2 r R 2 Sedentary .9973 a .99 .9932 a .99 Moderate .9080 a .82 .9053 a .82 Vigorous .8157 a .66 .8841 a .78 a

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Christopher Kuenze, Lisa Cadmus-Bertram, Karin Pfieffer, Stephanie Trigsted, Dane Cook, Caroline Lisee and David Bell

period. Freedson Adult VM3 cut points were then used to categorize physical activity as light, moderate, vigorous, or very vigorous based on the number of activity counts that occurred per minute during periods of wear time. 33 Based on the use of these cut points, we were able to calculate the amount

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Kenneth E. Powell and Steven N. Blair

risk-factor status of individuals meeting the commonly recommended volume of MVPA primarily with bouts ≥10 min in duration with that of individuals with comparable MVPA activity counts accumulated primarily with bouts <10 min in duration. Of 40 comparisons in these 14 studies, 78% (31) indicated that

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Deirdre Dlugonski, Katrina Drowatzky DuBose and Patrick Rider

71% (n = 12) of mothers had ≥6 valid days. Mothers accumulated 188,844 (47,966) vertical axis activity counts and walked 5504 (1274) steps per day. Mothers engaged in 284.0 (73.0) minutes of light-intensity activity, 16.5 (10.0) minutes of MVPA, and 520 (62) minutes of sedentary time per day

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Peng Zhang, Jung Eun Lee, David F. Stodden and Zan Gao

were set at 15-second intervals. Raw activity counts were interpreted using empirically established cut points that defined different PA intensity: sedentary (<100 count/min), LPA (101–2295 count/min), and MVPA (>2296 count/min). 22 Data were collected in September/October of 2012 (baseline assessment

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Laura D. Ellingson, Paul R. Hibbing, Gregory J. Welk, Dana Dailey, Barbara A. Rakel, Leslie J. Crofford, Kathleen A. Sluka and Laura A. Frey-Law

locations (e.g., hip vs. wrist), and data formats (e.g., raw vs. activity counts) ( Ellingson, Schwabacher, Kim, Welk, & Cook, 2016 ; Hibbing, Kim, Saint-Maurice, & Welk, 2016 ; Hildebrand, VAN Hees, Hansen, & Ekelund, 2014 ; Kim & Welk, 2015 ; Migueles et al., 2017 ). Previous work from our research

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Tiago V. Barreira, Stephanie T. Broyles, Catrine Tudor-Locke, Jean-Philippe Chaput, Mikael Fogelholm, Gang Hu, Rebecca Kuriyan, Estelle V. Lambert, Carol A. Maher, José A. Maia, Timothy Olds, Vincent Onywera, Olga L. Sarmiento, Martyn Standage, Mark S. Tremblay, Peter T. Katzmarzyk and for the ISCOLE Research Group

episode time distinct from waking nonwear time, and this was done using a 60-second epoch and published automated algorithms. 18 , 19 After exclusion of the nocturnal sleep episode time, nonwear time was determined as any sequence of at least 20 consecutive minutes of zero activity counts. 20 Once

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Sandra Silva-Santos, Amanda Santos, Michael Duncan, Susana Vale and Jorge Mota

of GMC was subsequently converted to z scores. MVPA and Sedentary Behavior MVPA and sedentary behavior were measured during seven consecutive days (Monday to Sunday using the ActiGraph GT1M accelerometer; Pensacola, FL, USA). This accelerometer provides output in activity counts, which offers