체간의 운동연쇄 형태에 따른 운동역학적 분석 = Biomechanical Analysis on Kinematic Chains Type of Trunk

다국어 초록 (Multilingual Abstract)

The purpose of this study was to investigate the trunk rotation type by wheel and axle. In order to analysis, 3D-motion analysis and electromyography were conducted on kinematic variables, impulse, average-EMG and integrated-EMG. Twelve healthy (age: 21.8±2.2 yrs, height: 175.4±5.0 cm, weight: 66.7±6.4 kg) participated in the experiment. The results were as follows; in hand`s velocity and acceleration, wheel and axial rotating movement using kinematic chain(type 3) were much faster. In impulse, type 3 was much stronger. In average-EMG, right and left, latissimus dorsi muscles was much stronger. In integrated-EMG, left erector spinae, right/left latissimus dorsi, and left external oblique muscles was much stronger. These results considered that, in the trunk rotation utilizing the kinematic chains action, latissimus dorsi muscles highly contribute to the muscle utilization that makes the rotating movement maximally effective.

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