[논문]평균대 한발 몸 펴 옆 공중돌기의 성패에 따른 운동학적 요인 분석

Jung, Choong Min; Park, Sang-Kyoon

doi:10.5103/kjsb.2022.32.1.24

평균대 한발 몸 펴 옆 공중돌기의 성패에 따른 운동학적 요인 분석
Analysis of Kinematic Factors between Success and Failure of Free Aerial Cartwheel on the Balance Beam 원문보기

한국운동역학회지 = Korean journal of sport biomechanics, v.32 no.1, 2022년, pp.24 - 30

Jung, Choong Min (Motion Innovation Centre, Korea National Sport University) , Park, Sang-Kyoon (Motion Innovation Centre, Korea National Sport University)

Abstract ▼ AI-Helper

Objective: The purpose of this study was to determine the factors of successful and unsuccessful movements through the analysis of kinematics and muscle activity of the Free Aerial Cartwheel on the balance beam. Method: Subjects (Age: 22.8 ± 2.4 yrs., Height: 158.7 ± 5.0 cm, Body mass: 54.1 ± 6.4 kg, Career: 13 ± 2.4 yrs.) who were currently active as female gymnasts participated in the study. They had no history of surgical treatment within 3 months. Subject criteria included more than 10 years of professional experience in college and professional level of gymnastics and the ability to conduct the Free Aerial Cartwheel on the Balance Beam. Each subject performed 10 times of Free Aerial Cartwheel on the balance beam. One successful trial and one unsuccessful trial (failure) among 10 trials were selected for the comparison. Results: It was found that longer time required in case of unsuccessful trial when performing the Free Aerial Cartwheel on the balance beam compared with successful trial. It is expected to be the result of movement in the last landing section (i.e. phase 5). In addition, it was found that the center of gravity of the body descends at a high speed to perform the jump (i.e. phase 2) in order to obtain a sufficient jumping height when the movement is successful while the knee joint is rapidly extended to perform a jump when movement fails. In the single landing section after the jump (i.e. phase 4), if the ankle joint rapidly dorsiflexed after take-off and the hip joint rapidly flexed, so landing was not successful. Conversely, in a successful landing movement, muscle activity of the biceps femoris was greatly activated resulting no shaking in the last landing section (i.e. phase 5). Conclusion: In order to succeed in this movement, it is necessary to perform a strong jump after rapidly descending the center of gravity of the body using the force of the biceps femoris muscle. Further improvement of the skills on the balance beam requires the analysis of the game-like situation with continuous research on kinematic and kinematic analysis of various techniques, jumps, turns, etc.

주제어

표/그림 (19)

그림 Figure 1. Camera and Balance beam installation (left) Markers and EMG attachment locations (right).
표 Table 1. Subject's physical characteristics
그림 Figure 2. Free Aerial Cartwheel of event and phase.
표 Table 2. Success and failure of each subject, except for motion
그림 Figure 3. Hip angle.
표 Table 3. Required time for each section (unit: sec)
표 Table 4. Maximum value of left and right (x-axis) speed of the center of gravity in the section (unit: m/s)
표 Table 5. Minimum value of velocity before and after the center of gravity (y-axis) in the section (unit: m/s)
표 Table 6. Minimum value of vertical (z-axis) velocity of the center of gravity in the section (unit: m/s)
표 Table 7. Maximum angle of left hip joint by section (unit: deg)
그림 Figure 4. Angular velocity of the ankle joint.
그림 Figure 5. Angular velocity of the knee joint.
그림 Figure 6. Angular velocity of the hip joint.
표 Table 8. Maximum angular velocity of the left ankle joint by section (unit: deg/s)
표 Table 9. Maximum angular velocity of the left knee joint by section (unit: deg/s)
표 Table 10. Maximum angular velocity of the left hip joint per section (unit: deg/s)
표 Table 11. Muscle activity of the left rectus femoris by section (unit: MVIC %)
표 Table 12. Muscle activity of the left biceps femoris by section (unit: MVIC %)
표 Table 13. Muscle activity of the left calf muscle by region (unit: MVIC %)

참고문헌 (17)

Aleksic-Veljkovic, A., Markovic, K. Z. & Milcic, L. (2019). The relationship between chosen kinematic parameters of the aerial cartwheel on the balance beam during skill learning. Baltic Journal of Health and Physical Activity, 11(1), 18-23.

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