Change in objectively measured physical activity during the transition to adolescence
Change in objectively measured physical activity during the transition to adolescence
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DOI：
10.1136/bjsports-2013-093190
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发表时间：
2015-06-01
影响因子：
18.4
通讯作者：
van Sluijs, Esther M. F.
中科院分区：
文献类型：
--
作者：
Corder, Kirsten;Sharp, Stephen J.;van Sluijs, Esther M. F.
体育活动（PA）在青春期下降，但不同人群中不同PA强度的变化很少被探索。我们描述了久坐（SED）时间的变化，轻度（LPA），中度（MPA）和剧烈PA （VPA）在4年内的三个时间点进行评估。方法在基线（N=2064）、1年和4年后获得加速度计评估的PA (min)，英国儿童（基线平均+/- SD 10.2 +/- 0.3岁；42.5%为男性）。采用三水平（年龄、个人和学校）混合效应线性回归研究SED （= 4000 cpm）的变化，包括>= 2时间点数据的参与者（N=990）。探讨了性别、家庭位置和体重状况的差异以及SED、LPA和中度和剧烈PA （MVPA）的相互作用。结果SED增加10.6 (95% CI 9.1 ~ 12.2) min/day/year。MPA和VPA分别降低1.4（1.0 ~ 1.8）和1.5 (1.1 ~ 1.8)min/d /年。VPA在基线值中的百分比下降超过MPA。尽管所有年龄段的女孩的MVPA都较低，但男孩的MVPA（3.9(3.0至4.8)）比女孩（2.0（1.2至2.7）分钟/天/年）下降得更快；农村（4.4(3.5至5.2)）vs城市（1.3（0.4至2.3）分钟/天/年），周末（6.7(5.2至8.1)）vs工作日（2.8（1.9至3.7）分钟/天/年）。超重/肥胖个体的MVPA持续较低（-17.5（-3.9至-2.5）分钟/天/年）。结论：在英国青少年早期，PA减少并被SED所取代。结果表明，在所有青少年中，尤其是女孩和农村地区推广PA的紧迫性。增加VPA和在周末有针对性地推广PA显得很重要。
Background Physical activity (PA) declines during adolescence but change in different PA intensities across population subgroups is rarely explored. We describe change in sedentary (SED) time, light (LPA), moderate (MPA) and vigorous PA (VPA) assessed at three time points over 4 years.Methods Accelerometer-assessed PA (min) was obtained at baseline (N=2064), 1 and 4 years later among British children (baseline mean +/- SD 10.2 +/- 0.3-year-old; 42.5% male). Change in SED (= 4000 cpm) was studied using three-level (age, individual and school) mixed-effects linear regression including participants with data at >= 2 time points (N=990). Differences in change by sex, home location and weight status were explored with interactions for SED, LPA and moderate and vigorous PA (MVPA).Results SED increased by 10.6 (95% CI 9.1 to 12.2) min/day/year. MPA and VPA decreased by 1.4 (1.0 to 1.8) and 1.5 (1.1 to 1.8) min/day/year, respectively. VPA decreased more than MPA as a percentage of the baseline value. MVPA declined more steeply among boys (3.9 (3.0 to 4.8)) versus girls (2.0 (1.2 to 2.7) min/day/year) despite lower MVPA among girls at all ages; rural (4.4 (3.5 to 5.2)) versus urban individuals (1.3 (0.4 to 2.3) min/day/year) and on weekends (6.7 (5.2 to 8.1)) versus weekdays (2.8 (1.9 to 3.7) min/day/year). MVPA was consistently lower among overweight/obese individuals (-17.5 (-3.9 to -2.5) min/day/year).Conclusions PA decreases and is replaced by SED during early adolescence in British youth. Results indicate the urgency of PA promotion among all adolescents but especially girls and in rural areas. Increasing VPA and targeting PA promotion during weekends appear important.