Cliff Dylan P, Reilly John J, Okely Anthony D
Child Obesity Research Centre, University of Wollongong, Australia.
J Sci Med Sport. 2009 Sep;12(5):557-67. doi: 10.1016/j.jsams.2008.10.008. Epub 2009 Jan 14.
This paper reviews the evidence behind the methodological decisions accelerometer users make when assessing habitual physical activity in children aged 0-5 years. The purpose of the review is to outline an evidence-guided protocol for using accelerometry in young children and to identify gaps in the evidence base where further investigation is required. Studies evaluating accelerometry methodologies in young children were reviewed in two age groups (0-2 years and 3-5 years) to examine: (i) which accelerometer should be used, (ii) where the accelerometer should be placed, (iii) which epoch should be used, (iv) how many days of monitoring are required, (v) how many minutes of monitoring per day are required, (vi) how data should be reduced, (vii) which cut-point definitions for identifying activity intensity should be used, and (viii) which physical activity outcomes should be reported and how. Critique of the available evidence provided a basis for the development of a recommended users protocol in 3-5-year olds, although several issues require further research. Because of the absence of methodological studies in children under 3 years, a protocol for the use of accelerometers in this age range could not be specified. Formative studies examining the utility, feasibility and validity of accelerometer-based physical activity assessments are required in children under 3 years of age. Recommendations for further research are outlined, based on the above findings, which, if undertaken, will enhance the accuracy of accelerometer-based assessments of habitual physical activity in young children.
本文回顾了加速度计使用者在评估0至5岁儿童习惯性身体活动时所做方法学决策背后的证据。本综述的目的是概述一个基于证据的幼儿加速度计使用方案，并确定证据基础中需要进一步研究的空白。对评估幼儿加速度计方法的研究按两个年龄组（0至2岁和3至5岁）进行了综述，以考察：（i）应使用哪种加速度计，（ii）加速度计应放置在何处，（iii）应使用哪种时间间隔，（iv）需要监测多少天，（v）每天需要监测多少分钟，（vi）数据应如何简化，（vii）应使用哪些用于识别活动强度的切点定义，以及（viii）应报告哪些身体活动结果以及如何报告。对现有证据的批判为制定3至5岁儿童推荐使用者方案提供了依据，尽管有几个问题需要进一步研究。由于缺乏3岁以下儿童的方法学研究，无法确定该年龄范围内加速度计的使用方案。需要对3岁以下儿童进行形成性研究，以检验基于加速度计的身体活动评估的实用性、可行性和有效性。基于上述发现概述了进一步研究的建议，如果开展这些研究，将提高基于加速度计的幼儿习惯性身体活动评估的准确性。
