BACKGROUND:Accurate measurement of physical activity patterns can be used to identify sedentary behaviour and may facilitate interventions aimed at reducing inactivity.
OBJECTIVE:To evaluate the activPAL physical activity monitor as a measure of posture and motion in everyday activities using observational analysis as the criterion standard.
METHODS:Wearing three activPAL monitors, 10 healthy participants performed a range of randomly assigned everyday tasks incorporating walking, standing and sitting. Each trial was captured on a digital camera and the recordings were synchronised with the activPAL. The time spent in different postures was visually classified and this was compared with the activPAL output.
RESULTS:Intraclass correlation coefficients (ICC 2,1) for interdevice reliability ranged from 0.79 to 0.99. Using the Bland and Altman method, the mean percentage difference between the activPAL monitor and observation for total time spent sitting was 0.19% (limits of agreement -0.68% to 1.06%) and for total time spent upright was -0.27% (limits of agreement -1.38% to 0.84%). The mean difference for total time spent standing was 1.4% (limits of agreement -6.2% to 9.1%) and for total time spent walking was -2.0% (limits of agreement -16.1% to 12.1%). A second-by-second analysis between observer and monitor found an overall agreement of 95.9%.
CONCLUSION:The activPAL activity monitor is a valid and reliable measure of posture and motion during everyday physical activities.
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【The validation of a novel activity monitor in the measurement of posture and motion during everyday activities.].
【在日常活动中测量姿势和运动时，新型活动监视器的验证。】
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DOI：10.1136/bjsm.2006.030262文章类型：杂志文章
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背景：对身体活动模式的准确测量可用于识别久坐行为，并可促进旨在减少运动量的干预措施。
目的：以观察性分析为标准，评估activPAL身体活动监测器，以衡量其日常活动中的姿势和运动。
方法：10名健康参与者戴着三副activPAL监视器，执行了一系列随机分配的日常任务，包括步行，站立和坐下。每个试验都在数码相机上捕获，并且记录与activPAL同步。用视觉对在不同姿势下花费的时间进行分类，并将其与activPAL输出进行比较。
结果：设备间可靠性的类内相关系数（ICC 2,1）范围为0.79至0.99。使用Bland和Altman方法，ActivPAL监控器与观察值之间的平均差额为总坐下时间为0.19％（协议限制-0.68％至1.06％），而整个直立时间为-0.27％（协议限制） -1.38％至0.84％）。站立总花费时间的平均差异为1.4％（同意限制-6.2％至9.1％），步行花费总时间的平均差异为-2.0％（同意限制-16.1％至12.1％）。观察者和监测者之间进行的第二次分析发现，总体符合率为95.9％。
结论：activPAL活动监测器是对日常体育活动中姿势和运动的有效且可靠的测量。
目的：以观察性分析为标准，评估activPAL身体活动监测器，以衡量其日常活动中的姿势和运动。
方法：10名健康参与者戴着三副activPAL监视器，执行了一系列随机分配的日常任务，包括步行，站立和坐下。每个试验都在数码相机上捕获，并且记录与activPAL同步。用视觉对在不同姿势下花费的时间进行分类，并将其与activPAL输出进行比较。
结果：设备间可靠性的类内相关系数（ICC 2,1）范围为0.79至0.99。使用Bland和Altman方法，ActivPAL监控器与观察值之间的平均差额为总坐下时间为0.19％（协议限制-0.68％至1.06％），而整个直立时间为-0.27％（协议限制） -1.38％至0.84％）。站立总花费时间的平均差异为1.4％（同意限制-6.2％至9.1％），步行花费总时间的平均差异为-2.0％（同意限制-16.1％至12.1％）。观察者和监测者之间进行的第二次分析发现，总体符合率为95.9％。
结论：activPAL活动监测器是对日常体育活动中姿势和运动的有效且可靠的测量。
