Kicking modality during erratic-dynamic and static condition effects the muscular co-activation of attacker.
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.
a Division of Sports Science , Korea Institutes of Sport Science , Seoul , Republic of Korea.
Tae-Whan
TW
Kim
a Division of Sports Science , Korea Institutes of Sport Science , Seoul , Republic of Korea.
Sang-Cheol
SC
Lee
a Division of Sports Science , Korea Institutes of Sport Science , Seoul , Republic of Korea.
Se-Kee
SK
Kil
b Department of Taekwondo , Yong In University , Yongin , Republic of Korea.
Sung-Chul
SC
Kang
c Department of Golf Teaching , Konkuk University , Chung-ju-si , Republic of Korea.
Young-Tae
YT
Lim
d Department of Physical Education , Seoul National University , Seoul , Republic of Korea.
Ki-Tae
KT
Kim
d Department of Physical Education , Seoul National University , Seoul , Republic of Korea.
Siddhartha Bikram
SB
Panday
D001696:Biomechanical Phenomena; D004576:Electromyography; D006621:Hip Joint / Q000502:physiology; D006801:Humans; D016139:Martial Arts / Q000502:physiology*; D009048:Motor Skills / Q000502:physiology*; D009068:Movement; D018482:Muscle, Skeletal / Q000502:physiology*; D011930:Reaction Time; D013996:Time and Motion Studies; D055815:Young Adult
Erratic-dynamic target; muscular co-activation index; roundhouse kick; taekwondo