Martin James C, Elmer Steven J, Horscroft Robert D, Brown Nicholas A T, Schultz Barry B
Department of Exercise and Sport Science, University of Utah, Salt Lake City, UT, USA.
J Appl Biomech. 2007 Aug;23(3):224-9. doi: 10.1123/jab.23.3.224.
The purpose of this study was to develop and evaluate an alternative method for determining the position of the anterior superior iliac spine (ASIS) during cycling. The approach used in this study employed an instrumented spatial linkage (ISL) system to determine the position of the ASIS in the parasagittal plane. A two-segment ISL constructed using aluminum segments, bearings, and digital encoders was tested statically against a calibration plate and dynamically against a video-based motion capture system. Four well-trained cyclists provided data at three pedaling rates. Statically, the ISL had a mean horizontal error of 0.03 +/- 0.21 mm and a mean vertical error of -0.13 +/- 0.59 mm. Compared with the video-based motion capture system, the agreement of the location of the ASIS had a mean error of 0.30 +/- 0.55 mm for the horizontal dimension and -0.27 +/- 0.60 mm for the vertical dimension. The ISL system is a cost-effective, accurate, and valid measure for two-dimensional kinematic data within a range of motion typical for cycling.
本研究的目的是开发并评估一种在骑行过程中确定髂前上棘（ASIS）位置的替代方法。本研究采用的方法是使用仪器化空间连杆（ISL）系统来确定ASIS在矢状旁平面内的位置。使用铝制部件、轴承和数字编码器构建的两段式ISL，先针对校准板进行静态测试，再针对基于视频的运动捕捉系统进行动态测试。四名训练有素的自行车运动员以三种踩踏速率提供数据。在静态测试中，ISL的水平平均误差为0.03±0.21毫米，垂直平均误差为-0.13±0.59毫米。与基于视频的运动捕捉系统相比，ASIS位置的一致性在水平维度上的平均误差为0.30±0.55毫米，在垂直维度上为-0.27±0.60毫米。ISL系统是一种经济高效、准确且有效的方法，可用于获取骑行典型运动范围内的二维运动学数据。
