or more hours per day compared with 5 or less hours per day. 4 The relation between sedentary behavior and CVD is complex. Sedentary behavior is shown to increase arterial stiffness and is a known contributor to hypertension and CVD. 5 , 6 Clearly, a reduction in sedentary time and replacement with
Ian M. Greenlund, Piersan E. Suriano, Steven J. Elmer, Jason R. Carter and John J. Durocher
Stephanie M. George, Catherine M. Alfano, Ashley Wilder Smith, Melinda L. Irwin, Anne McTiernan, Leslie Bernstein, Kathy B. Baumgartner and Rachel Ballard-Barbash
Many cancer survivors experience declines in health-related quality of life (HRQOL) and increases in fatigue as a result of cancer and its treatment. Exercise is linked to improvements in these outcomes, but little is known about the role of sedentary behavior. In a large, ethnically-diverse cohort of breast cancer survivors, we examined the relationship between sedentary time, HRQOL, and fatigue, and examined if that relationship differed by recreational moderate-vigorous physical activity (MVPA) level.
Participants were 710 women diagnosed with stage 0-IIIA breast cancer in the Health, Eating, Activity, and Lifestyle Study. Women completed questionnaires at approximately 30-months postdiagnosis (sedentary time; recreational MVPA) and 41-months postdiagnosis (HRQOL; fatigue). In multivariate models, we regressed these outcomes linearly on quartiles of daily sedentary time, and a variable jointly reflecting sedentary time quartiles and MVPA categories (0; >0 to <9; ≥9 MET-hrs/wk).
Sedentary time was not independently related to subscales or summary scores of HRQOL or fatigue. In addition, comparisons of women with high vs. low (Q4:Q1) sedentary time by MVPA level did not result in significant differences in HRQOL or fatigue.
In this breast cancer survivor cohort, self-reported sedentary time was not associated with HRQOL or fatigue, 3.5 years postdiagnosis.
Julien Tripette, Haruka Murakami, Hidemi Hara, Ryoko Kawakami, Yuko Gando, Harumi Ohno, Nobuyuki Miyatake and Motohiko Miyachi
, Sports, Science, and Technology, 2015 ). PA and Physical Fitness Step count (steps/day) and moderate-to-vigorous PA (MET-hr/day) were assessed objectively during a 1-month period, using accelerometer-based waist-worn PA monitors (Actimarker EW4800; Panasonic, Osaka, Japan). Sedentary time (<1.5 METs
Amy A. Eyler, Aaron Hipp, Cheryl Ann Valko, Ramya Ramadas and Marissa Zwald
time and include supports for physical and mental health, as well as active living 12 and decreased sedentary time. 11 As it is estimated that Americans spend about 90% of their time indoors, 13 designing buildings in ways that enhance health and provide opportunities for PA should be considered
Margina Ruiter, Charly Eielts, Sofie Loyens and Fred Paas
). 2 – 6 In light of the negative consequences of inactivity and sedentary behavior on physical health, there is increasing interest in exploring methods to reduce sedentary time in children. 6 , 7 The classroom, where children spend no less than 6 to 8 hours in seated academic instruction per day, 8
Rhona Martin-Smith, Duncan S. Buchan, Julien S. Baker, Mhairi J. Macdonald, Nicholas F. Sculthorpe, Chris Easton, Allan Knox and Fergal M. Grace
, it is well known that school-aged children and adolescents can accumulate a substantial amount of sedentary time during school hours ( 20 , 28 ), with findings from Scotland estimating that 3.8 to 5.6 hours per day are spent being sedentary ( 42 ). Therefore, given this decline in PA levels among
Kenneth E. Powell, Abby C. King, David M. Buchner, Wayne W. Campbell, Loretta DiPietro, Kirk I. Erickson, Charles H. Hillman, John M. Jakicic, Kathleen F. Janz, Peter T. Katzmarzyk, William E. Kraus, Richard F. Macko, David X. Marquez, Anne McTiernan, Russell R. Pate, Linda S. Pescatello and Melicia C. Whitt-Glover
al. 31 TV indicates television. Sedentary time, light physical activity, and MVPA interact within a finite, 24-hour day. A heat map developed by the 2018 PAGAC committee depicts the risk of all-cause mortality associated with various combinations of sitting time (in hours) and MVPA (in minutes) (Figure
Aline Mendes Gerage, Tânia Rosane Bertoldo Benedetti, Raphael Mendes Ritti-Dias, Ana Célia Oliveira dos Santos, Bruna Cadengue Coêlho de Souza and Fábio Araujo Almeida
during the study. Only 23 VAMOS participants and 26 CG participants had validated accelerometer data at preintervention and postintervention. Table 3 Sedentary Time and Physical Activity of Both Groups at Preintervention and Postintervention VAMOS (n = 23) CG (n = 26) Effects Group Time Interaction SED
Salih A. Salih, Nancye M. Peel, Di Enright and Wendy Marshall
capacity to perform. This relationship between MBI and walking time in the community has not been reported before. Promoting PA and aiming to achieve a clinically meaningful improvement in PA level in older persons has been shown to be challenging, as it requires changing behavior to reduce sedentary time
Salomé Aubert, Julien Aucouturier, Jeremy Vanhelst, Alicia Fillon, Pauline Genin, Caroline Ganière, Corinne Praznoczy, Benjamin Larras, Julien Schipman, Martine Duclos and David Thivel
Despite concerted efforts to promote physical activity and the development of strategies to reduce sedentary time, scientific data continue to reveal insufficient levels of physical activity 1 – 5 and increasing time devoted to sedentary behaviors 1 , 4 , 6 – 8 among children and youth