Is spending time in screen-based sedentary behaviors associated with less physical activity: a cross national investigation

International Journal of Behavioral Nutrition and Physical Activity

Research

Bente Wold¹  Torbjørn Torsheim¹  Ole Melkevik¹  Ronald J Iannotti² 

[1] Faculty of Psychology, University of Bergen, Christiesgate 13, N-5015, Bergen, Norway;NICHD - National Institute of Child Health and Human Development 6100 Executive boulevard, 7B05, MD20892-7510, Bethesda, USA;

关键词: Physical Activity;    Sedentary Behavior;    Vigorous Physical Activity;    Family Affluence Scale;    Strong Negative Association;   

DOI  :  10.1186/1479-5868-7-46

 received in 2009-07-09, accepted in 2010-05-21,  发布年份 2010

来源: Springer

【 摘 要 】

BackgroundIn Australia and the USA, national guidelines exist for limiting children's screen-exposure to two hours per day. This study aims to determine whether exceeding the suggested guidelines for screen-based sedentary behavior is associated with reduced levels of physical activity across different geographical regions.MethodsData material were taken from the 2005/2006 survey of "Health Behaviour in School-aged Children (HBSC) study; A WHO cross-National Survey". Data were collected through questionnaires from 11-,13- and,15- year olds. The final sample included 200,615 adolescents from 39 different countries in Europe and North America. Gender and country stratified analyses regressed time spent in leisure-time vigorous physical activity (VPA) and days of 60 minutes moderate to vigorous physical activity (MVPA) on time spent in screen-based sedentary behaviors. To simplify interpretation, the estimates from each country were pooled using a meta-analytic procedure.ResultsExceeding 2 hrs of daily total screen-time was negatively associated with MVPA for both boys and girls, and with VPA for girls. When investigating the different types of screen-based behaviors separately, exceeding 2 hrs daily of TV viewing was associated with less MVPA for both boys and girls and less VPA for girls. Gaming was associated with less MVPA and VPA for boys, and non-gaming computer use was associated with higher levels of VPA for both genders. Stronger negative associations between physical activity and screen-based sedentary behaviors were found in countries where mean levels of physical activity were relatively high. The association between physical activity and sedentary behavior was not significantly associated with national levels of screen-based sedentary behaviors.ConclusionsThe displacement mechanism does not appear to be universal across countries. On a national level, negative associations between physical activity and screen-based sedentary behaviors are less likely to be found in countries with relatively low levels of physical activity. Consequently, national guidelines for limiting children and adolescents time in screen-based sedentary behavior may not be conducive to increasing levels of physical activity in all countries.

【 授权许可】

CC BY   
© Melkevik et al; licensee BioMed Central Ltd. 2010