Estimation of Physical Activity Energy Expenditure during Free-Living from Wrist Accelerometry in UK Adults.
Estimation of Physical Activity Energy Expenditure during Free-Living from Wrist Accelerometry in UK Adults.
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DOI：
10.1371/journal.pone.0167472
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Brage S
中科院分区：
文献类型：
--
作者：
White T;Westgate K;Wareham NJ;Brage S
腕式加速度计正在成为大规模流行病学研究中测量体力活动的最常用工具，尽管人们对腕部加速度与体力活动能量消耗(PAEE)之间的关系知之甚少。1695名英国成年人连续6天同时佩戴两种设备：组合传感器和手腕加速度计。组合传感器测量心率和躯干加速度，与跑步机测试相结合，产生单独校准的PAEE信号。多水平回归模型被用来描述两个时间序列之间的关系，并在一个独立的坚持样本中对它们的估计进行了评估。最后，对于PAEE估计的每个来源(腕部加速模型和组合感觉)，分别描述了PAEE和BMI之间的关系。腕部加速可解释PAEE个体间变异的44-47%，RMSE在34-39J·min-1·kg-1之间。在交叉验证中，估计与PAEE很好地吻合(平均偏差[95%的一致限值]：0.07[-70.6：70.7])，但女性高估了3%，男性低估了4%。估计误差与年龄(-2.3J·min-1·kg-1/10年)和BMI(-0.3J·min-1·kg-1/kg/m2)呈负相关。所有PAEE估计值与BMI的相关性相似(每J·min-1·kg-1约为-0.08 kg/m2)。在自由生活的成年人中，腕部加速度和PAEE之间存在很强的相关性，因此，无论PAEE的客观评估方法是什么，PAEE和BMI之间都观察到了强烈的负相关。
Wrist-worn accelerometers are emerging as the most common instrument for measuring physical activity in large-scale epidemiological studies, though little is known about the relationship between wrist acceleration and physical activity energy expenditure (PAEE). 1695 UK adults wore two devices simultaneously for six days; a combined sensor and a wrist accelerometer. The combined sensor measured heart rate and trunk acceleration, which was combined with a treadmill test to yield a signal of individually-calibrated PAEE. Multi-level regression models were used to characterise the relationship between the two time-series, and their estimations were evaluated in an independent holdout sample. Finally, the relationship between PAEE and BMI was described separately for each source of PAEE estimate (wrist acceleration models and combined-sensing). Wrist acceleration explained 44–47% between-individual variance in PAEE, with RMSE between 34–39 J•min-1•kg-1. Estimations agreed well with PAEE in cross-validation (mean bias [95% limits of agreement]: 0.07 [-70.6:70.7]) but overestimated in women by 3% and underestimated in men by 4%. Estimation error was inversely related to age (-2.3 J•min-1•kg-1 per 10y) and BMI (-0.3 J•min-1•kg-1 per kg/m2). Associations with BMI were similar for all PAEE estimates (approximately -0.08 kg/m2 per J•min-1•kg-1). A strong relationship exists between wrist acceleration and PAEE in free-living adults, such that irrespective of the objective method of PAEE assessment, a strong inverse association between PAEE and BMI was observed.
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DOI：
10.1249/01.mss.0000185650.68232.3f
发表时间：
2005-11-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
Strath, SJ;Brage, S;Ekelund, U
通讯作者：
Ekelund, U
影响因子：
4.7
作者：
Brage, S;Brage, N;Wareham, NJ
通讯作者：
Wareham, NJ
影响因子：
3.3
作者：
Brage, S;Brage, N;Wareham, NJ
通讯作者：
Wareham, NJ
影响因子：
3.3
作者：
Villars, C.;Bergouignan, A.;Simon, C.
通讯作者：
Simon, C.
影响因子：
4.6
作者：
Stegle, Oliver;Fallert, Sebastian V.;Brage, Soren
通讯作者：
Brage, Soren