Composition of objectively measured physical activity and sedentary behaviour participation across the school-day, influence of gender and weight status: cross-sectional analyses among disadvantaged Victorian school children

被引:10
作者
Strugnell, Claudia [1 ]
Turner, Kyle [2 ]
Malakellis, Mary [1 ]
Hayward, Josh [1 ]
Foster, Charlie [2 ]
Millar, Lynne [1 ,3 ]
Allender, Steve [1 ,3 ]
机构
[1] Deakin Univ, Deakin Populat Hlth, World Hlth Org Collaborating Ctr Obes Prev, Geelong, Vic, Australia
[2] Univ Oxford, British Heart Fdn, Nuffield Dept Populat Hlth, Ctr Populat Approaches Noncommunicable Dis Preven, Oxford, Oxon, England
[3] Deakin Univ, Sch Hlth & Social Dev, Geelong, Vic, Australia
来源
BMJ OPEN | 2016年 / 6卷 / 09期
基金
英国医学研究理事会; 美国国家卫生研究院;
关键词
YOUNG-PEOPLE; AGED CHILDREN; AFTER-SCHOOL; INTERVENTIONS; HEALTH; ADOLESCENTS; MONITORS; FITNESS; TIME;
D O I
10.1136/bmjopen-2016-011478
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Background: The after-school period has been described as the 'critical window' for physical activity (PA) participation. However, little is known about the importance of this window compared with the before and during-school period among socioeconomically disadvantaged children, and influence of gender and weight status. Methods: 39 out of 156 (RR=25%) invited primary schools across 26 local government areas in Victoria, Australia, consented to participate with 856 children (RR=36%) participating in the wider study. The analysis sample included 298 Grade 4 and Grade 6 children (mean age: 11.2 +/- 1.1; 44% male) whom met minimum accelerometry wear-time criteria and had complete height, weight and health-behaviours questionnaire data. Accelerometry measured duration in daily light-intensity PA (LPA), moderate-to-vigorous PA (MVPA) and sedentary time (ST) was calculated for before-school=8-8: 59, during-school=9: 00-15: 29 and after-school=15: 30-18: 00. Bivariate and multivariable linear regression analyses were conducted. Results: During-school represented the greatest accumulation of LPA and MVPA compared with the before and after-school periods. Boys engaged in 102 min/day of LPA (95% CI 98.5 to 104.9) and 62 min/day of MVPA (95% CI 58.9 to 64.7) during-school; girls engaged in 103 min/day of LPA (95% CI 99.7 to 106.5) and 45 min/day of MVPA (95% CI 42.9 to 47.4). Linear regression models indicated that girls with overweight or obesity engaged in significantly less LPA, MVPA and more time in ST during-school. Conclusions: This study highlights the importance of in-school PA compared with after-school PA among socioeconomically disadvantage children whom may have fewer resources to participate in after-school PA.
引用
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页数:11
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