Conducting accelerometer-based activity assessments in field-based research
Conducting accelerometer-based activity assessments in field-based research
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DOI：
10.1249/01.mss.0000185657.86065.98
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发表时间：
2005-11-01
期刊：
影响因子：
--
通讯作者：
Pate, RR
中科院分区：
文献类型：
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作者：
Trost, SG;McIver, KL;Pate, RR
目的：本综述的目的是解决与基于加速度计对自由生活个体的体力活动进行评估有关的重要方法学问题。方法：我们回顾现有的科学文献，以获得与下列问题相关的经验信息：产品选择、所需加速度计的数量、加速度计的位置、历时长度以及评估习惯性体力活动所需的监测天数。我们还讨论了与分发和收集监测有关的各种选择以及加强遵守监测议定书的战略。结果：目前尚无确凿证据表明一种型号的加速度计比另一种型号的加速度计更有效和可靠。因此，加速度计的选择主要仍是一个实用性、技术支持以及与其他研究的可比性问题。使用多个加速计来估计能源支出的研究报告显示，解释能力只有轻微的改善。加速计最好放在臀部或下背部。虽然在成人中还没有研究周期长度的问题，但在儿童中使用基于1分钟时间间隔的计数分界点可能不合适，并可能导致低估体力活动。在成年人中，需要3-5天的监测才能可靠地估计习惯性体力活动。在儿童和青少年中，所需的监测天数从4天到9天不等，因此很难对这一群体得出明确的结论。在实地研究中，面对面分发和收集加速度计可能是最好的选择，但通过快递或挂号信进行投递和退货是一个可行的选择。结论：基于加速计的活动评估需要仔细规划和使用适当的策略来提高遵从性。
Purpose: The purpose of this review is to address important methodological issues related to conducting accelerometer-based assessments of physical activity in free-living individuals. Methods: We review the extant scientific literature for empirical information related to the following issues: product selection, number of accelerometers needed, placement of accelerometers, epoch length, and days of monitoring required to estimate habitual physical activity. We also discuss the various options related to distributing and collecting monitors and strategies to enhance compliance with the monitoring protocol. Results: No definitive evidence exists currently to indicate that one make and model of accelerometer is more valid and reliable than another. Selection of accelerometer therefore remains primarily an issue of practicality, technical support, and comparability with other studies. Studies employing multiple accelerometers to estimate energy expenditure report only marginal improvements in explanatory power. Accelerometers are best placed on hip or the lower back. Although the issue of epoch length has not been studied in adults, the use of count cut points based on 1-min time intervals maybe inappropriate in children and may result in underestimation of physical activity. Among adults, 3-5 d of monitoring is required to reliably estimate habitual physical activity. Among children and adolescents, the number of monitoring days required ranges from 4 to 9 d, making it difficult to draw a definitive conclusion for this population. Face-to-face distribution and collection of accelerometers is probably the best option in field-based research, but delivery and return by express carrier or registered mail is a viable option. Conclusion: Accelerometer-based activity assessments requires careful planning and the use of appropriate strategies to increase compliance.