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Alessandra Prioreschi and Lisa K. Micklesfield

Recently, new guidelines for the combination of movement behaviors (sleep, sedentary time, and physical activity) that make up a 24-hour day have been developed for the early years (0–5 y) in Australia and Canada. 1 , 2 Shortly thereafter, South Africa also launched movement guidelines for the

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Laura J. McGowan, Rachael Powell and David P. French

, this review found that interventions focusing on sedentary behavior alone produced larger reductions in sedentary time than interventions with a focus on physical activity, or those containing both physical activity and sedentary behavior components. These findings are supported by two subsequent

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Rawan Hashem, Juan P. Rey-López, Mark Hamer, Anne McMunn, Peter H. Whincup, Christopher G. Owen, Alex Rowlands and Emmanuel Stamatakis

indicators in Kuwaiti adolescents. Although in high-income countries there is a consistent inverse association between SES and adolescents’ total screen time, 10 , 11 fewer studies in the literature have examined the association between SES and objectively measured the total sedentary time. 10 One

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Mandy Peacock, Julie Netto, Polly Yeung, Joanne McVeigh and Anne-Marie Hill

.1097/00005768-199805000-00021 Gardiner , P.A. , Clark , B.K. , Healy , G.N. , Eakin , E.G. , Winkler , E.A.H. , & Owen , N. ( 2011 ). Measuring older adults’ sedentary time: Reliability, validity, and responsiveness . Medicine & Science in Sports & Exercise, 43, 2127 – 2133 . PubMed ID: 21448077 doi:10.1249/MSS.0b013e

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Stephen Hunter, Andrei Rosu, Kylie D. Hesketh, Ryan E. Rhodes, Christina M. Rinaldi, Wendy Rodgers, John C. Spence and Valerie Carson

intervals of 0 counts. Data were considered complete if participants had at least 4 days, with at least 6 hours per day (≥1440 counts) of wear time ( 25 , 27 ). It was assumed that daytime naps were removed with nonwear time. Sedentary time was defined as 0 to 24 counts per 15 seconds, light

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Paddy C. Dempsey, Chuck E. Matthews, S. Ghazaleh Dashti, Aiden R. Doherty, Audrey Bergouignan, Eline H. van Roekel, David W. Dunstan, Nicholas J. Wareham, Thomas E. Yates, Katrien Wijndaele and Brigid M. Lynch

recommended amounts of moderate- to vigorous-intensity physical activity (MVPA). 5 – 8 Moreover, observational studies 9 – 11 and an accumulating body of acute experimental studies 12 suggest that specific patterns of sedentary time (ie, whether sedentary behavior is undertaken in more prolonged or shorter

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John J. Reilly, Adrienne R. Hughes, Xanne Janssen, Kathryn R. Hesketh, Sonia Livingstone, Catherine Hill, Ruth Kipping, Catherine E. Draper, Anthony D. Okely and Anne Martin

time spent sedentary. 9 – 11 Sedentary time continues to increase with age, producing further declines in physical activity. Although sleep requirements naturally decrease with age, sleep duration is also affected by time spent in physical activity and sedentary behavior. 12 , 13 These movement

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Nicholas D. Gilson, Caitlin Hall, Andreas Holtermann, Allard J. van der Beek, Maaike A. Huysmans, Svend Erik Mathiassen and Leon Straker

total sedentary exposure for adults in general (ie, 7–8 h/d; 55%–56% of awake time). 40 , 41 Sedentary time of 8 hours per day or more has been linked to increased risk of all-cause mortality, independently of PA, 42 and in those who are not highly active (ie, accumulate less than 60 min of MVPA

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Peter T. Katzmarzyk and Amanda E. Staiano

in children. 15 Using data from 20,871 children 4–8 years of age, Ekelund et al 16 reported that higher MVPA was associated with lower systolic blood pressure and triglycerides and higher HDL-C within tertiles of sedentary time; however, there was no association between sedentary behavior and risk

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Laureen H. Smith, Devin Laurent, Erica Baumker and Rick L. Petosa

school-aged children. 12 – 14 Adolescents have been studied for PA patterns and sedentary time. 2 , 5 , 9 , 15 These studies focused on national rates or relied on small samples. They may not reveal unique trends within subpopulations. Obesogenic behaviors among adolescents who live in Appalachia have