Objectively measured patterns of sedentary time and physical activity in young adults of the Raine study cohort

International Journal of Behavioral Nutrition and Physical Activity

Research

Peter R. Eastwood¹  Mark S. Tremblay²  Rebecca A. Abbott³  Anne Smith⁴  Erin K. Howie⁴  Joanne A. McVeigh⁴  Leon M. Straker⁴  Genevieve N. Healy⁵  Elisabeth A. H. Winkler⁶ 

[1] Centre for Sleep Science, School of Anatomy, Physiology & Human Biology, University of Western Australia, Perth, Western Australia, Australia;Children’s Hospital of Eastern Ontario Research Institute, Ottawa, Canada;ESMI, University of Exeter Medical School, St.Luke’s Campus, Exeter, UK;School of Physiotherapy and Exercise Science, Curtin University, Perth, WA, Australia;School of Physiotherapy and Exercise Science, Curtin University, Perth, WA, Australia;The University of Queensland, School of Public Health, Brisbane, Australia;Baker IDI Heart & Diabetes Institute Melbourne, Victoria, Australia;The University of Queensland, School of Public Health, Brisbane, Australia;

关键词: Raine Study;    Young adults;    Physical activity;    Patterns;    Accumulation;    Sedentary behaviour;    Accelerometry;   

DOI  :  10.1186/s12966-016-0363-0

 received in 2015-12-22, accepted in 2016-03-16,  发布年份 2016

来源: Springer

【 摘 要 】

BackgroundTo provide a detailed description of young adults’ sedentary time and physical activity.Methods384 young women and 389 young men aged 22.1 ± 0.6 years, all participants in the 22 year old follow-up of the Raine Study pregnancy cohort, wore Actigraph GT3X+ monitors on the hip for 24 h/day over a one-week period for at least one ‘valid’ day (≥10 h of waking wear time). Each minute epoch was classified as sedentary, light, moderate or vigorous intensity using 100 count and Freedson cut-points. Mixed models assessed hourly and daily variation; t-tests assessed gender differences.ResultsThe average (mean ± SD) waking wear time was 15.0 ± 1.6 h/day, of which 61.4 ± 10.1 % was spent sedentary, 34.6 ± 9.1 % in light-, 3.7 ± 5.3 % in moderate- and, 0.3 ± 0.6 % in vigorous-intensity activity. Average time spent in moderate to vigorous activity (MVPA) was 36.2 ± 27.5 min/day. Relative to men, women had higher sedentary time, but also higher vigorous activity time. The ‘usual’ bout duration of sedentary time was 11.8 ± 4.5 min in women and 11.7 ± 5.2 min in men. By contrast, other activities were accumulated in shorter bout durations. There was large variation by hour of the day and by day of the week in both sedentary time and MVPA. Evenings and Sundays through Wednesdays tended to be particularly sedentary and/or inactive.ConclusionFor these young adults, much of the waking day was spent sedentary and many participants were physically inactive (low levels of MVPA). We provide novel evidence on the time for which activities were performed and on the time periods when young adults were more sedentary and/or less active. With high sedentary time and low MVPA, young adults may be at risk for the life-course sequelae of these behaviours.

【 授权许可】

CC BY   
© McVeigh et al. 2016