Perrott Margaret A, Pizzari Tania, Cook Jill, McClelland Jodie A
La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health, La Trobe University, Melbourne, Australia.
La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health, La Trobe University, Melbourne, Australia; Australian Collaboration for Research into Injury in Sport and its Prevention, La Trobe University, Melbourne, Australia.
Gait Posture. 2017 Feb;52:57-61. doi: 10.1016/j.gaitpost.2016.10.020. Epub 2016 Oct 31.
Three dimensional (3-D) motion capture systems are used by researchers and clinicians to analyze the kinematics of human movement. Traditional marker based systems are time consuming and limit the size of studies. Markerless 3-D systems are quicker to use but the differences between data captured in each system is unclear.
To examine the relationship of kinematic data captured by marker based and markerless motion capture systems.
Movement was assessed in two tests: a simple knee flexion test and single leg squat with a marker based protocol (Vicon) and a markerless protocol (Organic Motion).
There was no significant difference between protocols in knee flexion angle (p=0.33). In single leg squat there was no significant difference in 9 of 13 clinically relevant joint angles in the change in angle from the start to the peak of squat. There were significant differences in the angle at the peak of the squat for 9 of 13 joint angles.
This study provides evidence that a marker-based and a markerless protocol report similar ranges of change in angle from the start of a squat to peak squat in the pelvis and lower limb in single leg squat. Specific joint angles should not be compared between protocols.
研究人员和临床医生使用三维（3-D）运动捕捉系统来分析人体运动的运动学。传统的基于标记的系统耗时且限制了研究规模。无标记的3-D系统使用起来更快，但每个系统所采集数据之间的差异尚不清楚。
研究基于标记和无标记运动捕捉系统所采集运动学数据之间的关系。
通过两项测试评估运动：一项简单的膝关节屈曲测试和单腿深蹲，分别采用基于标记的方案（Vicon）和无标记方案（Organic Motion）。
在膝关节屈曲角度方面，两种方案之间无显著差异（p = 0.33）。在单腿深蹲中，从深蹲开始到峰值，13个临床相关关节角度中的9个在角度变化上无显著差异。13个关节角度中的9个在深蹲峰值时的角度存在显著差异。
本研究提供了证据，表明在单腿深蹲中，基于标记和无标记方案报告的从深蹲开始到骨盆和下肢深蹲峰值的角度变化范围相似。不应在不同方案之间比较特定关节角度。
