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운동역학 : 여자역도우수선수와 비우수선수간 용상동작의 비교 분석
최은자(EunJaChoi),김창범(ChangBumKim),신준용(JunYongShin) 한국체육학회 2005 한국체육학회지 Vol.44 No.2
The purpose of this study was to compare and analyze the kinematic parameters and action potential of muscles in clean and jerk techniques between excellent(n=3, national team) and non-excellent(n=3, high school) female weight lifters, using 3-dimensional image analysis and electromyogram(EMG) system. Each player performed clean and jerk technique with 80% weight of best record. This study resulted in as follows ; 1. By the result of the analysis about motion time required by step, both excellent and non-excellent players were the fastest at 1st pull step, and much time was required in dip-split step and stand up step. 3. The velocity of barbell by step showed that both excellent players and non-excellent players were fast at 2nd pull step and dip-split step. That is, displayed similar aspect between excellent players and non-excellent players. 4. By the result of analysis about the changes of knee joint angle by step, both excellent players and non-excellent players showed the biggest change between 2nd pull step and squat step. That is, in both groups the angle of knee joint increased gradually in 1st pull step and decreased a little passing last point of 2nd pull step. Also, the change of hip joint angle was similar to the change of knee joint angle. That is, both groups showed the biggest change between 2nd pull step and squat step. 5. By the result of EMG analysis in biceps femoris muscle by step, excellent players showed the highest action potential at 1st pull step, and non-excellent players displayed the highest action potential at 2nd pull step. 6. By the result of EMG analysis in vastus lateralis muscle by step, excellent players showed the highest action potential at squat step, and non-excellent players displayed high action potential at stand up step and dip-split step. 7. By the result of EMG analysis in erector spinae muscle L4, L5 by step, excellent players showed highest action potential at squat step, and non-excellent players displayed the highest action potential at dip-split step. 8. By the result of EMG analysis in trapezius muscle by step, both excellent players and non-excellent players showed the highest action potential at dip-split step.
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