Volume 6, Issue 1 (6-2020)
J Sport Biomech 2020, 6(1): 12-21 |
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Amiri Khorasani A, Amiri Khorasani M T, Mohammadipour F. Comparison of the Maximum Angular Velocity of Lower Limb Joints in Different Methods of Zenkutsu-dachi in Karate. J Sport Biomech 2020; 6 (1) :12-21
URL: http://biomechanics.iauh.ac.ir/article-1-205-en.html
URL: http://biomechanics.iauh.ac.ir/article-1-205-en.html
1- Department of Sport Biomechanic, Faculty of Physical Education and Sport Sciences, Shahid Bahonar University, Kerman, Iran.
Abstract: (2763 Views)
Objective: Proper performance of Dachi in karate as a basic technique has a direct impact on the performance of other techniques. The aim of the present is to compare the maximum angular velocities of the hip, knee and ankle joints under different Zenkutsu-dachi movement patterns in karate athletes.
Methods: Participants were 12 male karate athletes height= 175±5.5 cm; weight=75±5.5 kg, age=25±5.5 years, history=8±2.5 years). A three-dimensional motion analyzer with six synchronized infrared cameras at a video recording speed of 200 frames per second was used, and recordings were analyzed in Cortex 2.5.0 software. Zenkutsu-dachi forward movement was performed in six different patterns. The normality of the data distribution was confirmed by Shapiro-Wilk test. To test the study hypotheses, repeated measures ANOVA and Bonferroni post hoc test were used in SPSS V. 25 considering the significant level of P<0.05.
Results: There was a significant difference between movement patterns 3 and 4 and between patterns 5 and 6 in the hip joint (P<0.05), while no significant difference in the knee and ankle joints was reported. Each of the Zenkutsu-dachi movement patterns could change the position and range of motion of the hip joint and iliopsoas muscles.
Conclusion: By bringing the front leg more forward and bending the back leg slightly, the involved limbs and muscles can be in optimal state and creates greater angular velocity in the hip joint.
Methods: Participants were 12 male karate athletes height= 175±5.5 cm; weight=75±5.5 kg, age=25±5.5 years, history=8±2.5 years). A three-dimensional motion analyzer with six synchronized infrared cameras at a video recording speed of 200 frames per second was used, and recordings were analyzed in Cortex 2.5.0 software. Zenkutsu-dachi forward movement was performed in six different patterns. The normality of the data distribution was confirmed by Shapiro-Wilk test. To test the study hypotheses, repeated measures ANOVA and Bonferroni post hoc test were used in SPSS V. 25 considering the significant level of P<0.05.
Results: There was a significant difference between movement patterns 3 and 4 and between patterns 5 and 6 in the hip joint (P<0.05), while no significant difference in the knee and ankle joints was reported. Each of the Zenkutsu-dachi movement patterns could change the position and range of motion of the hip joint and iliopsoas muscles.
Conclusion: By bringing the front leg more forward and bending the back leg slightly, the involved limbs and muscles can be in optimal state and creates greater angular velocity in the hip joint.
Type of Study: Applicable |
Subject:
Special
Received: 2021/01/9 | Accepted: 2020/04/4 | Published: 2020/06/1
Received: 2021/01/9 | Accepted: 2020/04/4 | Published: 2020/06/1
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Journal of Sport Biomechanics
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