用于视频测量功能性动作筛查深蹲测试的测角仪移动设备应用程序的可靠性和准确性。
Reliability and accuracy of a goniometer mobile device application for video measurement of the functional movement screen deep squat test.
作者信息
Krause David A, Boyd Michael S, Hager Allison N, Smoyer Eric C, Thompson Anthony T, Hollman John H
机构信息
Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, Minnesota, USA.
Mayo School of Health Sciences, Mayo Clinic College of Medicine, Rochester, Minnesota, USA.
出版信息
Int J Sports Phys Ther. 2015 Feb;10(1):37-44.
BACKGROUND/PURPOSE: The squat is a fundamental movement of many athletic and daily activities. Methods to clinically assess the squat maneuver range from simple observation to the use of sophisticated equipment. The purpose of this study was to examine the reliability of Coach's Eye (TechSmith Corp), a 2-dimensional (2D) motion analysis mobile device application (app), for assessing maximal sagittal plane hip, knee, and ankle motion during a functional movement screen deep squat, and to compare range of motion values generated by it to those from a Vicon (Vicon Motion Systems Ltd) 3-dimensional (3D) motion analysis system.
METHODS
Twenty-six healthy subjects performed three functional movement screen deep squats recorded simultaneously by both the app (on an iPad [Apple Inc]) and the 3D motion analysis system. Joint angle data were calculated with Vicon Nexus software (Vicon Motion Systems Ltd). The app video was analyzed frame by frame to determine, and freeze on the screen, the deepest position of the squat. With a capacitive stylus reference lines were then drawn on the iPad screen to determine joint angles. Procedures were repeated with approximately 48 hours between sessions.
RESULTS
Test-retest intrarater reliability (ICC3,1) for the app at the hip, knee, and ankle was 0.98, 0.98, and 0.79, respectively. Minimum detectable change was hip 6°, knee 6°, and ankle 7°. Hip joint angles measured with the 2D app exceeded measurements obtained with the 3D motion analysis system by approximately 40°. Differences at the knee and ankle were of lower magnitude, with mean differences of 5° and 3°, respectively. Bland-Altman analysis demonstrated a systematic bias in the hip range-of-motion measurement. No such bias was demonstrated at the knee or ankle.
CONCLUSIONS
The 2D app demonstrated excellent reliability and appeared to be a responsive means to assess for clinical change, with minimum detectable change values ranging from 6° to 7°. These results also suggest that the 2D app may be used as an alternative to a sophisticated 3D motion analysis system for assessing sagittal plane knee and ankle motion; however, it does not appear to be a comparable alternative for assessing hip motion.
LEVEL OF EVIDENCE
背景/目的：深蹲是许多体育活动和日常活动中的一项基本动作。临床上评估深蹲动作的方法多种多样，从简单观察到使用复杂设备。本研究的目的是检验Coach's Eye（TechSmith公司）这款二维（2D）运动分析移动设备应用程序（应用）在功能动作筛查深蹲过程中评估矢状面髋关节、膝关节和踝关节最大运动的可靠性，并将其生成的运动范围值与Vicon（Vicon运动系统有限公司）三维（3D）运动分析系统生成的值进行比较。
方法
26名健康受试者进行三次功能动作筛查深蹲，应用程序（在iPad[苹果公司]上）和3D运动分析系统同时记录。关节角度数据使用Vicon Nexus软件（Vicon运动系统有限公司）计算。对应用程序视频逐帧分析，以确定并在屏幕上定格深蹲的最深位置。然后用电容式触控笔在iPad屏幕上绘制参考线以确定关节角度。各次测试之间间隔约48小时重复该过程。
结果
应用程序在髋关节、膝关节和踝关节的重测信度（组内相关系数ICC3,1）分别为0.98、0.98和0.79。最小可检测变化为髋关节6°、膝关节6°和踝关节7°。二维应用程序测量的髋关节角度比三维运动分析系统获得的测量值大约超出40°。膝关节和踝关节的差异较小，平均差异分别为5°和3°。Bland-Altman分析显示髋关节运动范围测量存在系统偏差。膝关节或踝关节未显示出此类偏差。
结论
二维应用程序显示出出色的可靠性，似乎是评估临床变化的一种灵敏手段，最小可检测变化值范围为6°至7°。这些结果还表明，二维应用程序可作为评估矢状面膝关节和踝关节运动的复杂三维运动分析系统的替代方法；然而，在评估髋关节运动方面，它似乎不是可比的替代方法。
证据水平
3级
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