Objectively measured physical activity in a representative sample of 3-to 4-year-old children
Objectively measured physical activity in a representative sample of 3-to 4-year-old children
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DOI：
10.1038/oby.2003.57
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发表时间：
2003-03-01
期刊：
影响因子：
--
通讯作者：
Paton, JY
中科院分区：
文献类型：
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作者：
Jackson, DM;Reilly, JJ;Paton, JY
目的：本研究旨在描述学龄前儿童的身体活动水平，并对1年以上的活动进行量化跟踪。研究方法和程序：身体活动在3至4岁儿童中使用计算机科学和应用加速计在3天内评估（平均加速度计计数/分钟）（n = 104; 52名男孩;平均年龄，3.7 +/- 0.4岁）。在60名儿童（30名男孩）中，1年后重复测量。结果：在基线时，男孩的平均总活动为777 +/- 207计数/分钟，女孩为657 +/- 172计数/分钟;这种性别差异是显著的（p < 0.001）。在横断面分析中，总活动与年龄呈显著正相关（r = 0.37，p = 0.007）。在随访1年的样本中，平均总活性为849 +/- 252。纵向分析证实，总体力活动在1年期间增加（配对学生t检验，p < 0.001）。跟踪秩序相关系数的总活动计数超过1年r 0.40（p < 0.001）。讨论：本研究表明，总活动增加在学龄前期间在苏格兰儿童和性别差异，总活动是目前在生命的早期。对总活动的跟踪只是适度的，但对跟踪的充分评估需要进行方法研究，目的是阐明加速度计输出的生物意义。
Objective: This study aimed to describe levels of physical activity in a representative sample of preschool children and to quantify tracking of activity over 1 year.Research Methods and Procedures: Physical activity (mean accelerometry counts/minute) was assessed over 3 days using the Computer Science and Applications accelerometer in 3- to 4-year-old children (n = 104; 52 boys; mean age, 3.7 +/- 0.4 years). In 60 children (30 boys), measurements were repeated 1 year later.Results: Mean total activity at baseline was 777 +/- 207 counts/minute in boys and 657 +/- 172 counts/minute for girls; this gender difference was significant (p < 0.001). In the cross-sectional analysis, total activity was significantly positively related to age (r = 0.37, p = 0.007). In the sample followed up for 1 year, mean total activity was 849 +/- 252. The longitudinal analysis confirmed that total physical activity increased over the 1-year period (paired Student's t test, p < 0.001). The tracking rank order correlation coefficient of total activity count over 1 year was r 0.40 (p < 0.001).Discussion: This study suggests that total activity increases during the preschool period in Scottish children and that gender differences in total activity are present early in life. Tracking of total activity was only modest, but adequate assessment of tracking requires methodological research aimed at elucidating the biological meaning of accelerometer output.