a The University of North Carolina at Chapel Hill.
Res Sports Med. 2003 Dec 1;11(4):209-18. doi: 10.1080/714041037.
The purpose of this study was to compare the between-day repeatability of the knee kinematics and kinetics in stair climbing and level walking among three marker sets: the Helen-Hays marker set with some markers on well-defined bony landmarks and some on not well-defined locations on soft tissues, the modified Helen-Hays marker set with a static calibration trial, and the UNC-CH marker set with all marker on well defined bony landmarks and a static calibration trial. Three-dimensional coordinates of markers in stair climbing and level walking were collected for six subjects on three days. Three-dimensional knee joint angles and resultant forces and moments were calculated. A between-day coefficient of multiple correlation was used to represent between-day repeatability of the knee joint angles, and resultant forces and moments during the stance phases of the stair climbing and level walking. Marker set had significant effect on the knee joint angles and resultant forces and moments (p < 0.02), except the knee axial force. The modified Helen-Hays marker set with a static calibration significantly improved the between-day repeatability for most of the knee angles and resultant forces and moments. The UNC-CH marker set with all markers on well-defined bony landmarks and a static calibration trial further improved the between-day repeatability of most the knee angles and resultant forces and moments.
本研究的目的是比较三种标记方案（Helen-Hays 标记方案，部分标记位于明确的骨骼标志上，部分标记位于软组织上不明确的位置；经过静态校准试验的改良 Helen-Hays 标记方案；以及所有标记均位于明确骨骼标志且经过静态校准试验的 UNC-CH 标记方案）在爬楼梯和水平行走时膝关节运动学和动力学的日内重复性。对 6 名受试者在 3 天内进行了爬楼梯和水平行走时的三维标记物采集。计算了三维膝关节角度和合成力和力矩。日内相关系数用于表示爬楼梯和水平行走的站立阶段膝关节角度、合成力和力矩的日内重复性。标记方案对膝关节角度和合成力和力矩有显著影响（p < 0.02），除了膝关节轴向力。经过静态校准的改良 Helen-Hays 标记方案显著提高了大多数膝关节角度和合成力和力矩的日内重复性。所有标记均位于明确骨骼标志且经过静态校准试验的 UNC-CH 标记方案进一步提高了大多数膝关节角度和合成力和力矩的日内重复性。
