Objectively measured physical activity and sedentary time in youth: the International children's accelerometry database (ICAD).
Objectively measured physical activity and sedentary time in youth: the International children's accelerometry database (ICAD).
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DOI：
10.1186/s12966-015-0274-5
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发表时间：
2015-09-17
期刊：
影响因子：
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通讯作者：
Ekelund U
中科院分区：
文献类型：
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作者：
Cooper AR;Goodman A;Page AS;Sherar LB;Esliger DW;van Sluijs EM;Andersen LB;Anderssen S;Cardon G;Davey R;Froberg K;Hallal P;Janz KF;Kordas K;Kreimler S;Pate RR;Puder JJ;Reilly JJ;Salmon J;Sardinha LB;Timperio A;Ekelund U
据报告，青年的体育活动和久坐行为因性别、年龄、体重状况和国家而异。然而，支持性数据往往是自我报告的和/或不包括广泛的年龄或地理位置。本研究旨在描述青年人客观测量的身体活动和久坐时间模式。国际儿童加速度计数据库（ICAD）由来自10个国家的20项研究的ActiGraph加速度计数据组成，使用通用数据简化程序进行处理。对27，637名参与者（2.8-18.4岁）进行了分析，他们提供了至少三天的有效加速度计数据。使用线性回归来检查年龄，性别，体重状况，国家和体力活动结果之间的关联。在所有年龄段，男孩比女孩更少久坐，更活跃。5岁以后，随着年龄的增加，总体力活动的平均横截面下降4.2%，主要是由于低强度体力活动水平降低和久坐时间增加。在最小的孩子中，身体活动并没有因体重状况而有所不同，但从7岁开始，超重/肥胖的参与者比正常体重的参与者更不活跃。来自不同国家的样本之间的身体活动各不相同，9-10岁时最高和最低国家之间的差异为15- 20%，12-13岁时的差异为26- 28%。来自不同国家的样本之间的体力活动不同，但人口统计学特征和体力活动之间的关联是一致的。需要进一步的研究来探讨这些差异的环境和社会文化解释。本文的在线版本（doi：10.1186/s12966-015-0274-5）包含补充材料，可供授权用户使用。
Physical activity and sedentary behaviour in youth have been reported to vary by sex, age, weight status and country. However, supporting data are often self-reported and/or do not encompass a wide range of ages or geographical locations. This study aimed to describe objectively-measured physical activity and sedentary time patterns in youth. The International Children’s Accelerometry Database (ICAD) consists of ActiGraph accelerometer data from 20 studies in ten countries, processed using common data reduction procedures. Analyses were conducted on 27,637 participants (2.8–18.4 years) who provided at least three days of valid accelerometer data. Linear regression was used to examine associations between age, sex, weight status, country and physical activity outcomes. Boys were less sedentary and more active than girls at all ages. After 5 years of age there was an average cross-sectional decrease of 4.2 % in total physical activity with each additional year of age, due mainly to lower levels of light-intensity physical activity and greater time spent sedentary. Physical activity did not differ by weight status in the youngest children, but from age seven onwards, overweight/obese participants were less active than their normal weight counterparts. Physical activity varied between samples from different countries, with a 15–20 % difference between the highest and lowest countries at age 9–10 and a 26–28 % difference at age 12–13. Physical activity differed between samples from different countries, but the associations between demographic characteristics and physical activity were consistently observed. Further research is needed to explore environmental and sociocultural explanations for these differences. The online version of this article (doi:10.1186/s12966-015-0274-5) contains supplementary material, which is available to authorized users.