Longitudinal Study of Physical Activity and Sedentary Behavior in Children
Longitudinal Study of Physical Activity and Sedentary Behavior in Children
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DOI：
10.1542/peds.2010-1935
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发表时间：
2011-01-01
期刊：
影响因子：
8
通讯作者：
Reilly, John J.
中科院分区：
文献类型：
--
作者：
Basterfield, Laura;Adamson, Ashley J.;Reilly, John J.
目的：体育活动被认为在儿童时期会减少，但减少的程度尚不清楚。我们对参加盖茨黑德千年研究的英国儿童进行了2年的身体活动和久坐行为变化的客观测量，以探索青春期前身体活动和久坐行为变化的性质、时间和程度。方法：我们在2006/2007年和24个月后对405名7岁儿童（207名女孩）进行了纵向研究。使用Actigraph GT1M加速度计测量身体活动和久坐行为。数据于2010年进行分析。对身体活动总量（每分钟加速计计数[cpm]）、中高强度身体活动（MVPA）和久坐行为的变化进行量化。使用线性回归测试与体力活动和久坐行为变化相关的因素。在2年的时间里，对身体活动和久坐行为的追踪是通过秩序相关来评估的。结果：平均每日体力活动量在2年内下降了83 cpm（四分位数范围[IQR]: -189至31）；每日在MVPA中花费的时间百分比在基线时很低，下降了0.3% （IQR: -1.4至0.9）。每日久坐行为的百分比在基线时很高，从78.0%增加到81.1%（变化3.1% [IQR: -0.3至6.0]）。MVPA的下降和久坐行为的增加在女孩和基线BMI分数较高的人群中更为明显。在2年的时间里，体育活动和久坐行为显示出适度的跟踪。结论：我们在此报告了青少年前身体活动和MVPA水平低和下降以及久坐行为增加的新证据。儿科2011;127: e24-e30
OBJECTIVE: Physical activity is thought to decline during childhood, but the extent of the decline is unknown. We made objective measures of 2-year changes in physical activity and sedentary behavior in English children who participated in the Gateshead Millennium Study to explore the nature, timing, and extent of changes in physical activity and sedentary behavior before adolescence.METHODS: We conducted a longitudinal study of 405 children (207 girls), aged 7 years, in 2006/2007 and again 24 months later. Physical activity and sedentary behavior were measured with the Actigraph GT1M accelerometer. Data were analyzed in 2010. Changes in total volume of physical activity (accelerometer counts per minute [cpm]), moderate-to-vigorous-intensity physical activity (MVPA), and sedentary behavior were quantified. Factors associated with changes in physical activity and sedentary behavior were tested by using linear regression. Tracking of physical activity and sedentary behavior over the 2-year period was assessed by rank-order correlation.RESULTS: Mean daily volume of physical activity declined by 83 cpm (interquartile range [IQR]: -189 to 31) over 2 years; the percentage of daily time spent in MVPA was low at baseline and declined by 0.3% (IQR: -1.4 to 0.9). The percentage of daily time in sedentary behavior was high at baseline and increased from 78.0% to 81.1% of the day (change 3.1% [IQR: -0.3 to 6.0]). The decline in MVPA and increase in sedentary behavior were significantly greater in girls and in those with higher BMI z scores at baseline. Physical activity and sedentary behavior showed moderate tracking over the 2-year period.CONCLUSIONS: We report here new evidence of low and declining levels of physical activity and MVPA and increasing sedentary behavior before adolescence. Pediatrics 2011;127:e24-e30