加速度计校准方法对成年人中高强度身体活动估计的影响。
Influence of Accelerometer Calibration Approach on Moderate-Vigorous Physical Activity Estimates for Adults.
机构信息
Metabolic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD.
Kinesiology Department, California Polytechnic State University, San Luis Obispo, CA.
出版信息
Med Sci Sports Exerc. 2018 Nov;50(11):2285-2291. doi: 10.1249/MSS.0000000000001691.
PURPOSE
To compare estimates of moderate-vigorous physical activity (MVPA) duration derived from accelerometers calibrated only to walking and running activities to estimates from calibrations based on a broader range of lifestyle and ambulatory activities.
METHODS
In a study of 932 older (50-74 yr) adults we compared MVPA estimates from accelerometer counts based on three ambulatory calibration methods (Freedson 1952 counts per minute; Sasaki 2690 counts per minute; activPAL 3+ METs) to estimates based on calibrations from lifestyle and ambulatory activities combined (Matthews 760 counts per minute; Crouter 3+ METs; Sojourn3x 3+ METs). We also examined data from up to 6 previous-day recalls describing the MVPA in this population.
RESULTS
The MVPA duration values derived from ambulatory calibration methods were significantly lower than methods designed to capture a broader range of both lifestyle and ambulatory activities (P < 0.05). The MVPA (h·d) estimates in all participants were: Freedson (median, 0.35; interquartile range, 0.17-0.58); Sasaki (median, 0.91; interquartile range, 0.59-1.32); and activPAL (median, 0.97; interquartile range, 0.71-1.26) compared with Matthews (median, 1.82; interquartile range, 1.37-2.34); Crouter (2.28 [1.72-2.82]); and Sojourn3x (median, 1.85; interquartile range, 1.42-2.34). Recall-based estimates in all participants were comparable (median, 1.61; interquartile range, 0.89-2.57) and indicated participation in a broad range of lifestyle and ambulatory MVPA.
CONCLUSIONS
Accelerometer calibration studies that employ only ambulatory activities may produce MVPA duration estimates that are substantially lower than methods calibrated to a broader range of activities. These findings highlight the potential to reduce potentially large differences among device-based measures of MVPA due to variation in calibration study design by including a variety of lifestyle and ambulatory activities.
目的
比较仅针对步行和跑步活动进行校准的加速度计得出的中高强度体力活动（MVPA）持续时间估计值与基于更广泛的生活方式和活动范围进行校准的估计值。
方法
在一项针对 932 名老年人（50-74 岁）的研究中，我们比较了基于三种活动校准方法（Freedson 每分钟 1952 计数；Sasaki 每分钟 2690 计数；activPAL 3+ METs）的加速度计计数得出的 MVPA 估计值与基于生活方式和活动综合校准的估计值（Matthews 每分钟 760 计数；Crouter 3+ METs；Sojourn3x 3+ METs）。我们还检查了多达 6 份前一天回忆报告中该人群的 MVPA 数据。
结果
基于活动校准方法得出的 MVPA 持续时间值明显低于旨在捕捉更广泛的生活方式和活动范围的方法（P<0.05）。所有参与者的 MVPA（h·d）估计值分别为：Freedson（中位数，0.35；四分位距，0.17-0.58）；Sasaki（中位数，0.91；四分位距，0.59-1.32）；activPAL（中位数，0.97；四分位距，0.71-1.26）与 Matthews（中位数，1.82；四分位距，1.37-2.34）；Crouter（2.28[1.72-2.82]）；和 Sojourn3x（中位数，1.85；四分位距，1.42-2.34）。所有参与者的回忆基础估计值相似（中位数，1.61；四分位距，0.89-2.57），并表明他们参与了广泛的生活方式和活动范围的 MVPA。
结论
仅使用活动的加速度计校准研究可能会产生大大低于基于更广泛活动范围进行校准的方法的 MVPA 持续时间估计值。这些发现强调了通过包括各种生活方式和活动，减少由于校准研究设计的差异而导致基于设备的 MVPA 测量值之间可能存在的较大差异的潜力。
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