Objectively measured physical activity, sedentary time and sleep duration: independent and combined associations with adiposity in canadian children

Abstract

Objective:To examine independent and combined associations among objectively measured movement/non-movement behaviors (moderate-to-vigorous-intensity physical activity (MVPA), total sedentary time and sleep duration) and adiposity indicators in a sample of Canadian children.Methods:A cross-sectional study was conducted on 507 children aged 9–11 years from Ottawa, Canada. Movement/non-movement behaviors were assessed using an Actigraph GT3X+ accelerometer over 7 days (24-h protocol). Outcomes included percentage body fat (bioelectrical impedance) and waist-to-height ratio.Results:After adjustment for age, sex, ethnicity, maturity offset, fast food consumption, annual household income and highest level of parental education, MVPA was inversely and sedentary time positively associated with adiposity indicators, whereas sleep duration was not. However, only MVPA remained significantly associated with adiposity indicators after additional adjustment for the other movement/non-movement behaviors. Combined associations using tertiles of the three movement/non-movement behaviors showed that higher levels of MVPA were associated with lower adiposity indicators, irrespective of total sedentary time and sleep duration.Conclusions:Higher levels of MVPA were associated with lower adiposity in this sample of children regardless of sedentary time and sleep duration. Although correlational in nature, these findings suggest that future efforts of obesity reduction should focus more on increasing MVPA than on reducing sedentary time or increasing sleep duration to maximize the effectiveness of interventions.

Combinations of physical activity, sedentary behaviour and sleep: relationships with health indicators in school-aged children and youth

“…All studies were published in 2008 or later, with participants ranging from 4-18 years of age (the mean age was between 5.0 and 17.9 years). Of the 14 included studies, 10 reported on adiposity (Aggio et al 2015;Chaput et al 2014b;De Bourdeaudhuij et al 2013;Ekelund et al 2012;Herman et al 2014;Hjorth et al 2014b;Katzmarzyk et al 2015;Laurson et al 2008Laurson et al , 2014Loprinzi et al 2015), 3 on cardiometabolic risk factors (de Moraes et al 2013;Ekelund et al 2012;Hjorth et al 2014a), and 3 on cardiorespiratory or musculoskeletal fitness (Aggio et al 2015;Martinez-Gomez et al 2011;Santos et al 2014). Two papers (Aggio et al 2015;Ekelund et al 2012) reported on more than 1 indicator.…”

“…SB was objectively measured using accelerometers in 12 studies (Aggio et al 2015;Chaput et al 2014b;De Bourdeaudhuij et al 2013;de Moraes et al 2013;Ekelund et al 2012;Martinez-Gomez et al 2011;Herman et al 2014;Hjorth et al 2014aHjorth et al , 2014bKatzmarzyk et al 2015;Loprinzi et al 2015;Santos et al 2014), and self-reported in 4 studies (Herman et al 2014;Hjorth et al 2014b;Laurson et al 2008Laurson et al , 2014. Two studies (Herman et al 2014;Hjorth et al 2014b) included both self-reported and objective measures of SB.…”

“…Adiposity was reported in 10 cross-sectional studies, representing 7 unique datasets, and 30 746 individual participants (Aggio et al 2015;Chaput et al 2014b;De Bourdeaudhuij et al 2013;Ekelund et al 2012;Herman et al 2014;Hjorth et al 2014b;Katzmarzyk et al 2015;Laurson et al 2008Laurson et al , 2014Loprinzi et al 2015) (Table 2). Mean ages from individual studies ranged from 9.3-11.6 years.…”

Systematic review of sedentary behaviour and health indicators in school-aged children and youth: an update

“…Two studies used the [2007][2008][2009] Canadian Health Measures Survey (Colley et al 2012(Colley et al , 2013. Three studies used the International Study of Childhood Obesity, Lifestyle, and the Environment (Chaput et al 2014b;Katzmarzyk et al 2015aKatzmarzyk et al , 2015b. Two studies used the 2003-2004 and 2005-2006 National Health and Nutrition Examination Survey (Carson and Janssen 2011;Peart et al 2011).…”

Systematic review of the relationships between sleep duration and health indicators in school-aged children and youth

“…e Includes 58 cross-sectional studies (Al-Hazzaa 2014;Al-Hazzaa et al 2012;Araujo et al 2012;Awad et al 2013;Bawazeer et al 2009;Bel et al 2013;Berentzen et al 2014;Butte et al 2007;Chaput et al 2011Chaput et al , 2014Calamaro et al 2010;Colley et al 2012;Culnan et al 2013;Danielsen et al 2010;de Jong et al 2012;Do et al 2013;Ekstedt et al 2013;Eisenmann et al 2006;Garaulet et al 2011;Guo et al 2012;Gupta et al 2002;Hense et al 2011;Hiscock et al 2011;Hjorth et al 2014aHjorth et al , 2014bHuang et al 2010;Katzmarzyk et al 2015;Knutson 2005;Knutson and Lauderdale 2007;Kong et al 2011;Kuciene and Dulskiene 2014;Lee and Park 2014;Liou et al 2010;Lowry et al 2012;Magee et al 2013a;Martinez-Gomez et al 2011;Meldrum and Restivo 2014;Morley et al 2012;Martinez et al 2014;Ozturk et al 2009;Padez et al 2009;Pallesen et al 2011;Park 2011…”