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:: Volume 1, Number 2 (12-2015) ::
J Sport Biomech 2015, 1(2): 33-39 Back to browse issues page
Upper Limbs Kinematics of Liberation Moment in the Elite Archers
Mohsen Damavandi *, Ms. Nafiseh Bakhshandeh-zahmati, Mehrdad Fathi
1. Department of Sport Biomechanics, Faculty of Physical Education and Sport Sciences, Hakim Sabzevari University, Sabzevar, Iran.
Abstract:   (2879 Views)

Objective: The purpose of this study was to evaluate the kinematics of liberation moment in the elite archers.
Methods: Ten elite archers (male = 5, female = 5), who were the members of the provincial and national teams, were studied. The trunk and upper extremities of the subjects were determined by 5 reflective markers. Each archer performed 10 successful trials. Using Motion Analysis System (150 Hz with a low pass filter having a cut-off frequency of 7 Hz) and based on markers’ coordination, the angles and angular velocities of the shoulder, elbow, and wrist of pulling hand in the sagittal plane at the moment of liberation were calculated. Results: Means (SD) of the shoulder, elbow, and wrist angles were 93.1 (4.0), 135.7 (5.7), 15.3 (2.8) °, respectively. Means (SD) of the shoulder, elbow, and wrist angular velocities were 55.4 (23.5), 38.4 (16.1), 81.9 (36.6) °/s, respectively.
Conclusion: The fast wrist extension causes a quick arrow release and enhancements in the results of archery. In addition, coordination between elbow flexion and shoulder extension assists the archer to pull the bow at its maximum range. These amounts and kinematic relations can serve as a criterion for coaches and elementary archers to enhance their level of performance.

Keywords: Archery, Upper extremity, Joints angle, Joint angular velocity, Kinematics
Full-Text [PDF 332 kb]   (692 Downloads)    
Type of Study: Research | Subject: Special
Received: 2014/11/27 | Accepted: 2015/03/6 | Published: 2015/07/14
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Damavandi M, Bakhshandeh-zahmati N, Fathi M. Upper Limbs Kinematics of Liberation Moment in the Elite Archers . J Sport Biomech. 2015; 1 (2) :33-39
URL: http://biomechanics.iauh.ac.ir/article-1-32-en.html
Volume 1, Number 2 (12-2015) Back to browse issues page
فصلنامه بیومکانیک ورزشی Journal of Sport Biomechanics
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