태권도 기술격파 주특기에 따른 체간 안정성 및 근파워 분석

Abstract

The purpose of this research is to compare the trunk stability and anaerobic power of athletes who major specialties of technical breaking in Taekwondo demonstration events, to present efficient training methods and directions for athletes who practice kicking techniques except their main specialties or trainees who are new to technical breaking. A total of 12 male demonstrators from C University in G Metropolitan City were selected as subjects of the study, including six players whose main specialty is vertical axis rotation and six players whose main specialty is horizontal axis rotation who have not experienced musculoskeletal injuries in the past six months. Trunk stability was compared through trunk muscle strength and thickness. The trunk muscle strength was measured by the centaur 3d system, a three-dimensional spinal stabilizer, and the case of thickness of the trunk muscle was measured by ultrasonic equipment, such as rectus abdominis (RA), transversus abdominis (TRA), and multifidus (MF). In the case of anaerobic power, the upper and lower limbs were measured, and arm ergometers and bicycle ergometers were used. The load was set differently for each weight and required the strongest power for 30 seconds. Among the output values, the peak power, mean power, peak power per weight, and mean power per weight were compared. All data collected through this research were compared using the SPSS 27.0 program. The normality was not satisfied because insufficient number of groups, the nonparametric test Mann-Whitney U test was used. The results of the study are as follows. First, there was no statistically significant difference in comparison of trunk muscle strength between the two groups. It is because both two groups did not only use trunk muscles, but also proper cooperation with the upper and lower limbs was required. Second, there was a statistically significant difference in MF in the comparison of trunk muscle thickness, and the horizontal rotation group appeared higher than the vertical rotation group. It is expected that the horizontal rotating group caused the development of MF in the process of rapidly extending the bent body when kicking in midair. Third, there was no statistically significant difference in the comparison of the anaerobic power of the upper limbs. Both groups use the upper limbs, however it is judged that they did not have a significant impact on the anaerobic performance of the upper limbs because they are performed in cooperation with the lower limbs. Fourth, in the comparison of the anaerobic power of the lower limbs, there was a significant difference in the peak power and vertical rotation groups was found to be dominant. In mean power, peak power per weight, and mean power per weight, the vertical rotation group was also dominant on average. This is judged to have been affected by the load applied to the lower limbs in the process of performing a lot of jumping kicks supported by one foot by a vertical rotating group.