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Purpose:
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.
Asian Journal of Sports Medicine
Sports Medicine Research Center, TUMS
Assessment of Correlation between Electrogoniometer Measurements and Sports-Specific Movement in Karate Elites
Author(s):
2Sports Medicine Research Center, Tehran university of Medical Sciences, Tehran, Iran
1Rasoul Akram Hospital, Iran University of Medical Science, Tehran, Iran
3Rehabilitation Research Center, Department of Physical Therapy, Faculty of Rehabilitation Science, Iran university of medical Science, Tehran, Iran
4Biomechanics Lab, Rehabilitation Research Center, School of Rehabilitation, Department of Rehabilitation Basic Sciences, Iran University of Medical Sciences, Tehran, Iran
Published online:Feb 19, 2014
Article type:Research Article
Received:Jun 12, 2013
Accepted:Feb 12, 2014
How to Cite:Lotfian S, Safar Cherati A, Jamshidi A, Sanjari MA. Assessment of Correlation between Electrogoniometer Measurements and Sports-Specific Movement in Karate Elites. Asian J Sports Med. 2014;5(2):23020. doi:
Abstract
Methods:
A total of 23 elite karate athletes (13 females and 10 males; mean age of 16.101.26 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.
Results:
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.
Conclusion:
Dachi could be divided into three distinct phases; each of them should constitute a specific percent of the total in an elite athlete
Copyright
© 2014, Author(s). This open-access article is available under the Creative Commons Attribution 4.0 (CC BY 4.0) International License (https://creativecommons.org/licenses/by/4.0/), which allows for unrestricted use, distribution, and reproduction in any medium, provided that the original work is properly cited.
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