A local position measurement (LPM) system can accurately track the distance covered and the average speed of whole-body movements. However, for the quantification of a soccer player's workload, accelerations rather than positions or speeds are essential. The main purpose of the current study was therefore to determine the accuracy of LPM in measuring average and peak accelerations for a broad range of (maximal) soccerspecific movements. Methods: Twelve male amateur soccer players performed 8 movements (categorized in straight runs and runs involving a sudden change in direction of 90° or 180°) at 3 intensities (jog, submaximal, maximal). Position-related parameters recorded with LPM were compared with Vicon motion-analysis data sampled at 100 Hz. The differences between LPM and Vicon data were expressed as percentage of the Vicon data. Results: LPM provided reasonably accurate measurements for distance, average speed, and peak speed (differences within 2% across all movements and intensities). For average acceleration and deceleration, absolute bias and 95% limits of agreement were 0.01 ± 0.36 m/s
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机译：本地位置测量（LPM）系统可以准确跟踪所覆盖的距离以及全身运动的平均速度。但是，为了量化足球运动员的工作量，加速度而不是位置或速度是必不可少的。因此，当前研究的主要目的是确定LPM在测量各种（最大）足球特定运动的平均加速度和峰值加速度时的准确性。方法：12名男性业余足球运动员在3种强度（慢跑，次最大，最大）下进行了8次动作（分为直线运动和涉及90°或180°方向突然变化的跑步）。用LPM记录的位置相关参数与以100 Hz采样的Vicon运动分析数据进行比较。 LPM和Vicon数据之间的差异表示为Vicon数据的百分比。结果：LPM提供了距离，平均速度和峰值速度的合理准确的测量值（所有运动和强度的差异在2％以内）。对于平均加速和减速，绝对偏差和协议的95％限制为0.01±0.36 m / s
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