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http://dx.doi.org/10.5103/KJSB.2014.24.1.001

The Effect of Stretch-Shortening Cycle on the Joint Power of the Jireugi in the Taekwondo Juchumseogi Stance  

Choi, Chi-Sun (Department of Physical Education, Seoul National University)
Chung, Chul-Soo (Department of Physical Education, Seoul National University)
Shin, In-Sik (Department of Physical Education, Seoul National University)
Publication Information
Korean Journal of Applied Biomechanics / v.24, no.1, 2014 , pp. 1-9 More about this Journal
Abstract
The purpose of this study was to investigate the muscle mechanical properties of the pelvic axial pre-rotational movement for the Jireugi in the Taekwondo Juchumseogi stance. Eleven elite Taekwondo Poomsae athletes participated. Each participant performed 5 right hand Jireugi in Juchumseogi stance as fast and strong as possible while their motion was recorded by a 3D motion analysis system and the ground reaction forces by two force plates. The power and work of the muscular group surrounding the waist were analyzed to verify the effect of the stretch-shortening cycle (SSC) theory. The cause of the greater power seems to be the application of the SSC by the muscles surrounding the waist during the preparation phase of the pre-rotation group. For the none pre-rotation group, they only used the concentric contraction of the muscles surrounding the waist. Because the pre-rotation group used the SSC theory, they had the effect of shortening of the range of movement, creating a fast and more powerful rotation, thus anticipating the increase the magnitude of impact.
Keywords
Taekwondo; Axial Pre-rotational Movement of the Pelvis; Stretch-Shortening Cycle (SSC);
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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