Kicking modality during erratic-dynamic and static condition effects the muscular co-activation of attacker |
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| Authors: | Tae-Whan Kim Sang-Cheol Lee Se-Kee Kil Sung-Chul Kang Young-Tae Lim |
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| Institution: | 1. Division of Sports Science, Korea Institutes of Sport Science, Seoul, Republic of Korea;2. Department of Taekwondo, Yong In University, Yongin, Republic of Korea;3. Department of Golf Teaching, Konkuk University, Chung-ju-si, Republic of Korea |
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| Abstract: | The purpose of the study was to investigate the effect of different kicking modality, i.e., erratic-dynamic target (EDT) versus static target (ST) on the performance of the roundhouse kick in two groups of taekwondo athletes of different skill level. Three-dimensional analysis and surface electromyography (SEMG) analysis were performed on 12 (Group A: six sub-elite, Group B: six elite) athletes to investigate muscle co-activation pattern under two conditions, i.e., EDT versus ST. In the results, the muscle recruitment ratio of the agonistic muscles was higher for Group A, whereas Group B had higher recruitment ratio for antagonist muscles. Overall, the co-activation index (CI) of hip joints appeared higher in the extensors for Group A, whereas higher CI was observed in flexor muscles for Group B with comparatively higher CI during EDT condition than ST condition. Higher value of CI was observed in flexor muscles of the knee joints among Group A during EDT conditions, in contrast, higher CI in the extensor muscles was observed among Group B during ST conditions. In conclusion, the study confirmed that erratic-dynamic movements of target could change the movement coordination pattern to maintain the joint stability of participants. |
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| Keywords: | Erratic-dynamic target muscular co-activation index roundhouse kick taekwondo |
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