Reactivity: an issue for short-term pedometer studies?
Reactivity: an issue for short-term pedometer studies?
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DOI：
10.1136/bjsm.2007.038521
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发表时间：
2008-01-01
影响因子：
18.4
通讯作者：
Wane, S. L.
中科院分区：
文献类型：
--
作者：
Clemes, S. A.;Matchett, N.;Wane, S. L.
目的：调查佩戴计步器并记录每日步数对步行活动的影响。方法：在第一次访问实验室期间，向 50 名健康志愿者提供密封计步器（New-Lifestyles NL-2000）（New-Lifestyles NL-2000），并告知其是“身体姿势监测器”（密封条件）。参与者在一周的清醒时间内佩戴计步器。返回实验室后，下载步数并记录参与者被告知，该设备实际上是一个计步器。他们被要求在第二个一周内未密封地佩戴它，并在活动日志中记录他们的步数（未密封条件）。结果：密封条件下报告的平均（SD）每日步数（9541（3186）步/天）显着低于未密封条件下报告的步数（11385（3763）步/天）（p < 0.001）。结论：在未密封的情况下，步数显着增加，可能的机制包括佩戴计步器的知识、可见的步数显示和活动日志的完成，这对短期研究（持续时间）具有有效性影响。
Objectives: To investigate the influence of wearing a pedometer and recording daily step counts on ambulatory activity.Methods: During the first visit to the laboratory, 50 healthy volunteers, blinded to the study aim, were provided with a sealed pedometer (New-Lifestyles NL-2000) and informed that it was a "body posture monitor'' (sealed condition). Participants wore the pedometer throughout waking hours for one week. Upon returning to the laboratory step counts were downloaded and participants were informed that the device was actually a pedometer. They were requested to wear it unsealed for a second one-week period, and to record their step counts in an activity log (unsealed condition).Results: Mean (SD) daily step counts reported in the sealed condition (9541 (3186) steps/day) were significantly lower than step counts reported in the unsealed condition (11385 (3763) steps/day) (p < 0.001).Conclusions: Step counts increased significantly in the unsealed condition. Possible mechanisms for this include the knowledge of wearing a pedometer, the visible step count display and the completion of the activity log. This has validity implications for short-term studies (duration