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Ronit Aviram, Netta Harries, Anat Shkedy Rabani, Akram Amro, Ibtisam Nammourah, Muhammed Al-Jarrah, Yoav Raanan, Yeshayahu Hutzler and Simona Bar-Haim

encouraged to increase habitual physical activity (HPA) and reduce sedentary behavior ( 29 ). It is also clear that physical activity declines in typically developing (TD) individuals through adolescence with a concurrent increase in sedentary time in many populations that have been sampled ( 5 , 11 , 23

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Mynor Rodriguez-Hernandez, Jeffrey S. Martin, David D. Pascoe, Michael D. Roberts and Danielle W. Wadsworth

, and 49% greater risk of all-cause mortality. Although physical inactivity (ie, sedentary time) seems to be highly predictive of metabolic risks, Healy et al 12 recently demonstrated that replacement of sedentary time with even light physical activity markedly decreased risk of metabolic disease in an

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André O. Werneck, Evelyn C.A. Silva, Maria R.O. Bueno, Lidyane Z. Vignadelli, Adewale L. Oyeyemi, Catiana L.P. Romanzini, Enio R.V. Ronque and Marcelo Romanzini

, sedentary behavior has emerged as a “new” health behavior ( 20 ). However, this behavior is best understood when objectively quantified. In addition, it is important to investigate the patterns of sedentary behavior in terms of bouts, which is characterized as a period of uninterrupted sedentary time (a

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Sofia W. Manta, Paula F. Sandreschi, Thiago S. Matias, Camila Tomicki and Tânia R.B. Benedetti

consequences for the health of older adults ( Brocklebank, Falconer, Page, Perry, & Cooper, 2015 ). When combined, PA and sedentary time (ST) can form different patterns of behavior, with a synergistic effect, thus highlighting the importance of interventions that stimulate a positive pattern to produce health

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Liane S. Lewis, James Hernon, Allan Clark and John M. Saxton

 ± 169 143 ± 147 209 ± 197 .39 Steps˙wk –1 39939 ± 12700 43711 ± 5659 3872 ± 14432 .57 Sedentary time (min˙wk –1 ) 3919 ± 1380 4051 ± 805 3708 ± 757 .21 Abbreviations: ACC = accumulated; FL = free-living; IPAQ = International Physical Activity Questionnaire; OH = Occupational and Household related; TM

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Ignacio Perez-Pozuelo, Thomas White, Kate Westgate, Katrien Wijndaele, Nicholas J. Wareham and Soren Brage

combined with movement intensity metrics may allow us to further understand how different postures relate to different activities and activity intensities. In this study, we aimed to describe the distribution of forearm postures, acceleration, derived sedentary time, and physical activity energy

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Alex S. Ribeiro, Luiz C. Pereira, Danilo R.P. Silva, Leandro dos Santos, Brad J. Schoenfeld, Denilson C. Teixeira, Edilson S. Cyrino and Dartagnan P. Guedes

categories of physical activity according to the recommendations of the American College of Sports Medicine ( Garber et al., 2011 ). Subjects who reported ≥150 min per week in moderate and vigorous physical activity were classified as “physically active.” Sedentary time was self-reported for both the

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Sarah G. Sanders, Elizabeth Yakes Jimenez, Natalie H. Cole, Alena Kuhlemeier, Grace L. McCauley, M. Lee Van Horn and Alberta S. Kong

moderate intensity, and at least some vigorous-intensity activity daily. 1 Sedentary time recommendations are not yet established; however, the American Academy of Pediatrics recommends limiting sedentary time by keeping time spent using electronic media below 2 hours per day. 3 Self-report and

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Simon Marshall, Jacqueline Kerr, Jordan Carlson, Lisa Cadmus-Bertram, Ruth Patterson, Kari Wasilenko, Katie Crist, Dori Rosenberg and Loki Natarajan

The purpose of this study was to compare estimates of sedentary time on weekdays vs. weekend days in older adults and determine if these patterns vary by measurement method. Older adults (N = 230, M = 83.5, SD = 6.5 years) living in retirement communities completed a questionnaire about sedentary behavior and wore an ActiGraph accelerometer for seven days. Participants engaged in 9.4 (SD = 1.5) hr per day of accelerometer-measured sedentary time, but self-reported engaging in 11.4 (SD = 4.9) hr per day. Men and older participants had more accelerometer-measured sedentary time than their counterparts. The difference between accelerometer-measured weekday and weekend sedentary time was nonsignificant. However, participants self-reported 1.1 hr per day more sedentary time on weekdays compared with weekend days. Findings suggest self-reported but not accelerometer-measured sedentary time should be investigated separately for weekdays and weekend days, and that self-reports may overestimate sedentary time in older adults.

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Nicola D. Ridgers, Karen E. Lamb, Anna Timperio, Helen Brown and Jo Salmon

toy, and participating schools received a small bag of sports equipment as compensation for their time. Measures Physical Activity and Sedentary Time Each child wore a GT3X+ accelerometer on his or her right hip using an adjustable nylon belt. Acceleration data are sampled using a 12-bit analog