Lotfian Sara, Cherati Afsaneh Safar, Jamshidi Aliashraf, Sanjari Mohammad Ali
Rasoul Akram Hospital, Iran University of Medical Science, Tehran, Iran ; Sports Medicine Research Center, Tehran university of Medical Sciences, Tehran, Iran.
Rehabilitation Research Center, Department of Physical Therapy, Faculty of Rehabilitation Science, Iran university of medical Science, Tehran, Iran.
Asian J Sports Med. 2014 Jun;5(2):115-22.
To examine the intra-rater reliability of knee movement data in sagital plane obtained from electrogoniometer (EGM) in a basic, sport-specific task of karate.
A total of 23 elite karate athletes (13 females and 10 males; mean age of 16.10±1.26 yrs) participated in this study. The task was defined as performing three consecutive Zenkutsu-dachi in two sessions. The used EGM was a twin axis of Biometrics company. EGM curves were plotted in MATLAB software separately. The indices of three points in the plots corresponding to extremes of flexion and extension of knee in the first dachi were determined. There was also another (forth) point which was not in extremes of movement. As it was repeated in all curves, it was perceived as a biomechanical event and was assessed. The phases of movement between the points were scaled between 0 to 100% of activity.
Repeatability of the forth point index was assessed by intraclass correlation method. Intraclass correlation of the ratio in the first testing session was 0.666 and in second was 0.448. The interval between points were considered as phases of movement. After determining three phases of dachi, it was shown that these phases pertained a specific ratio of the total plot which were 48%, 36% and 16% of total respectively.
Dachi could be divided into three distinct phases; each of them should constitute a specific percent of the total in an elite athlete.
在空手道一项基本的、特定运动任务中，检验通过电子角度计（EGM）获得的膝关节矢状面运动数据的评分者内信度。
共有23名精英空手道运动员（13名女性和10名男性；平均年龄16.10±1.26岁）参与本研究。任务定义为在两个阶段连续进行三次前屈立。使用的EGM是Biometrics公司的双轴电子角度计。EGM曲线分别在MATLAB软件中绘制。确定了与第一次前屈立中膝关节屈伸极限相对应的曲线上三个点的指标。还有另一个（第四个）点不在运动极限处。由于在所有曲线中都重复出现，它被视为一个生物力学事件并进行评估。各点之间的运动阶段按活动的0%至100%进行缩放。
采用组内相关法评估第四个点指标的重复性。第一次测试阶段该比率的组内相关性为0.666，第二次为0.448。各点之间的间隔被视为运动阶段。确定前屈立的三个阶段后，结果表明这些阶段分别占总图的特定比例，分别为总图的48%、36%和16%。
前屈立可分为三个不同阶段；在精英运动员中，每个阶段应占总数的特定百分比。
