Daily Step Target to Measure Adherence to Physical Activity Guidelines in Children
Daily Step Target to Measure Adherence to Physical Activity Guidelines in Children
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DOI：
10.1249/mss.0b013e31823f23b1
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发表时间：
2012-05-01
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影响因子：
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通讯作者：
Tremblay, Mark S.
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文献类型：
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作者：
Colley, Rachel C.;Janssen, Ian;Tremblay, Mark S.
科利河C.的方法，I. JANSSEN，和M. S.特伦布雷。每日步数目标，以衡量坚持身体活动指南的儿童。医学科学体育锻炼，第44卷，第5期，第100页。977-982，2012年。目的：目前缺乏有力的证据来支持相当于儿童和青少年当前身体活动指南的每日步数目标。这些信息对于使用计步器监测身体活动的研究人员和从业人员来说是有用的。研究方法：在加拿大健康措施调查中收集的6-19岁儿童和青少年的加速度计和计步器数据用于本分析（n = 1613）。每日步数和分钟的中度到剧烈的体力活动（MVPA）的年龄和性别的相关性分析完成。每日步数相当于60分钟的MVPA是通过年龄和性别的线性回归得出的。完成了交叉验证，包括受试者工作曲线分析，以将新的临界点与目前用作每日MVPA 60分钟（每天13，500步）的替代估计值以及每天8000至15，000步之间的可能步数目标范围进行比较。结果：每日步数与每日MVPA分钟数呈显著正相关（r = 0.81，P < 0.0001）。相当于60分钟MVPA的步数范围为每天11，290至12，512步（R-2范围= 0.59-0.74）。与每天8000至15,000步之间的任何临界点（包括目前使用的每天13,500步的每日步数目标）相比，每天12,000步的步数目标导致更接近满足身体活动指南的人群估计值（通过加速度计测量为MVPA分钟数），以及灵敏度和特异性之间的平衡改善。结论：我们建议将每天12，000步作为一个目标，以确定6-19岁的儿童和青少年是否符合目前每天60分钟MVPA的身体活动指南。
COLLEY, R. C., I. JANSSEN, and M. S. TREMBLAY. Daily Step Target to Measure Adherence to Physical Activity Guidelines in Children. Med. Sci. Sports Exerc., Vol. 44, No. 5, pp. 977-982, 2012. Purpose: There is a lack of robust evidence to support a daily step count target that equates to current physical activity guidelines in children and youth. This information would be useful to researchers and practitioners who are using pedometers to monitor physical activity. Methods: Accelerometer and pedometer data collected on children and youth age 6-19 yr in the Canadian Health Measures Survey were used in this analysis (n = 1613). Correlation analyses of daily step counts and minutes of moderate-to-vigorous physical activity (MVPA) by age and sex were completed. The daily step count equivalent to 60 min of MVPA was derived using linear regression by age and sex. Cross-validation, including receiver operating curve analysis, was completed to compare the new cut points to one currently used as a proxy estimate of 60 min of daily MVPA (13,500 steps per day) as well as a range of possible step count targets between 8000 and 15,000 steps per day. Results: Daily step counts were correlated with daily minutes of MVPA (r = 0.81, P < 0.0001). The step count equivalents to 60 min of MVPA ranged between 11,290 and 12,512 steps per day (R-2 range = 0.59-0.74). A step count target of 12,000 steps per day resulted in closer population estimates of meeting the physical activity guideline (as measured as minutes of MVPA by accelerometer) as well as improved balance between sensitivity and specificity when compared with any cut point between 8000 and 15,000 steps per day, including the currently used daily step count target of 13,500 steps per day. Conclusions: We propose that 12,000 steps per day be used as a target to determine whether children and youth age 6-19 yr are meeting the current physical activity guideline of 60 min of daily MVPA.