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首页> 外文期刊>Journal of sports sciences. >Validation of two accelerometers to determine mechanical loading of physical activities in children
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Validation of two accelerometers to determine mechanical loading of physical activities in children

机译：验证两个加速度计以确定儿童身体活动的机械负荷

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摘要

The purpose of this study was to assess the validity of accelerometers using force plates (i.e., ground reaction force (GRF)) during the performance of different tasks of daily physical activity in children. Thirteen children (10.1 (range 5.4-15.7)years, 3 girls) wore two accelerometers (ActiGraph GT3X+ (ACT), GENEA (GEN)) at the hip that provide raw acceleration signals at 100Hz. Participants completed different tasks (walking, jogging, running, landings from boxes of different height, rope skipping, dancing) on a force plate. GRF was collected for one step per trial (10 trials) for ambulatory movements and for all landings (10 trials), rope skips and dance procedures. Accelerometer outputs as peak loading (g) per activity were averaged. ANOVA, correlation analyses and Bland-Altman plots were computed to determine validity of accelerometers using GRF. There was a main effect of task with increasing acceleration values in tasks with increasing locomotion speed and landing height (P<0.001). Data from ACT and GEN correlated with GRF (r=0.90 and 0.89, respectively) and between each other (r=0.98), but both accelerometers consistently overestimated GRF. The new generation of accelerometer models that allow raw signal detection are reasonably accurate to measure impact loading of bone in children, although they systematically overestimate GRF.
机译：这项研究的目的是评估在执行儿童日常日常体育活动的不同任务期间使用测力板（即地面反作用力（GRF））进行的加速度计的有效性。十三名儿童（10.1岁（范围5.4-15.7）岁，三个女孩）的臀部配有两个加速度计（ActiGraph GT3X +（ACT），GENEA（GEN）），可提供100Hz的原始加速度信号。参与者在测力板上完成了不同的任务（步行，慢跑，跑步，从不同高度的箱子着陆，跳绳，跳舞）。 GRF在每次试验（10次试验）中为步态运动和所有着陆（10次试验），跳绳和舞蹈程序收集了一个步骤。加速度计输出为每项活动的峰值负荷（g）的平均值。计算了方差分析，相关分析和Bland-Altman图，以确定使用GRF的加速度计的有效性。在增加运动速度和着陆高度的任务中，任务的主要影响是加速度值的增加（P <0.001）。来自ACT和GEN的数据与GRF相关（分别为r = 0.90和0.89）以及彼此之间（r = 0.98），但是两个加速度计始终高估了GRF。尽管可以系统地高估GRF，但新一代的加速度计模型可以检测原始信号，因此可以相当准确地测量儿童骨骼的冲击负荷。

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