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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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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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Jana Slaght, Martin Sénéchal and Danielle R. Bouchard

the pedometer data we measured the total number of minutes spent in MVPA per week based on their individualized threshold at 40% VO 2 R. The raw accelerometer data was analyzed to see what activity count was associated with the same number of minutes in MVPA as the pedometer information. For accuracy

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Laura E. Juliff, Jeremiah J. Peiffer and Shona L. Halson

piezoelectric accelerometer, which sampled activity counts in 1-minute epochs. Epoch-for-epoch concordance rates of 81% to 90% with polysomnography (gold standard sleep measure) have been found for sleep/wake activity using Actical® wrist actigraphy monitors. 14 Participants wore the monitor at all times

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Juliana S. Oliveira, Leanne Hassett, Catherine Sherrington, Elisabeth Ramsay, Catherine Kirkham, Shona Manning and Anne Tiedemann

use of a waist-worn accelerometer (ActiGraph GT3X+, Pensacola, FL) and was expressed as mean activity counts/min/day and mean number of steps/day. Goal Setting Participants nominated two function-related goals that met the S.M.A.R.T criteria. Goals were determined in a collaborative manner by the

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Liina Remmel, Vallo Tillmann, Eva Mengel, Pille Kool, Priit Purge, Evelin Lätt and Jaak Jürimäe

from 0.05 to 2.00 GS with a frequency response of 0.25–2.50 Hz. All participants wore the accelerometer on the right hip for 7 consecutive days during the wake-up time. The accelerometer data were analyzed using the activity counts of 15-second epochs ( 15 ). For the analyses of accelerometer data, all

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Karen C. Smith, Griffin L. Michl, Jeffrey N. Katz and Elena Losina

above 175 steps per minute. We included days with at least 10 hours of wear time and, per CDC guidelines, counted minutes of MVPA in bouts of 10 minutes, with 2 “grace minutes” during which steps could fall beneath the threshold. 32 Each minute of vigorous physical activity counted as 2 minutes of

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Brian M. Wood, Herman Pontzer, Jacob A. Harris, Audax Z.P. Mabulla, Marc T. Hamilton, Theodore W. Zderic, Bret A. Beheim and David A. Raichlen

). Free-living activity counts-derived breaks in sedentary time: Are they real transitions from sitting to standing? Gait & Posture, 42, 70 – 72 . doi: 10.1016/j.gaitpost.2015.04.008 Blurton Jones , N. ( 2016 ). Demography and evolutionary ecology of Hadza hunter-gatherers .  Cambridge, United

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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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Kelli L. Cain, Edith Bonilla, Terry L. Conway, Jasper Schipperijn, Carrie M. Geremia, Alexandra Mignano, Jacqueline Kerr and James F. Sallis

acceleration in horizontal and perpendicular planes, and activity counts can be expressed as a composite “vector magnitude” (VM) of 3 axes [sqrt(X 2  + Y 2  + Z 2 )]. As vector magnitude (VM) should detect movement that may be common during sedentary time but not easily detected on the vertical plane (ie