title: Assessment of Correlation between Electrogoniometer Measurements and Sports-Specific Movement in Karate Elites.
abstract: OBJECTIVE
  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.
  
  
  METHODS
  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.
  
  
  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.
  
  
  CONCLUSIONS
  Dachi could be divided into three distinct phases; each of them should constitute a specific percent of the total in an elite athlete.
authors.affiliation: Rasoul Akram Hospital, Iran University of Medical Science, Tehran, Iran ; Sports Medicine Research Center, Tehran university of Medical Sciences, Tehran, Iran.
authors.forename: Sara
authors.initials: S
authors.lastname: Lotfian
authors.affiliation: Rasoul Akram Hospital, Iran University of Medical Science, Tehran, Iran ; Sports Medicine Research Center, Tehran university of Medical Sciences, Tehran, Iran.
authors.forename: Afsaneh Safar
authors.initials: AS
authors.lastname: Cherati
authors.affiliation: Rehabilitation Research Center, Department of Physical Therapy, Faculty of Rehabilitation Science, Iran university of medical Science, Tehran, Iran.
authors.forename: Aliashraf
authors.initials: A
authors.lastname: Jamshidi
authors.affiliation: Biomechanics Lab, Rehabilitation Research Center, School of Rehabilitation, Department of Rehabilitation Basic Sciences, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Sanjari
keywords: Dachi; Electrogoniometer; Karate; Kinematics; Reliability
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