남·녀 역도 인상동작의 운동역학적 분석

Abstract

The purpose of this study was to prepare some useful data for the improvement of weightlift performance ability and the prevention of injury by analyzing the biomechanic in snatch of weightlifter. Biomechanic variables were analyzed with the aid of the visual materials with a high speed video camera, such as the displacement of barbell, the time during the motion and moment of the snatch motion. The analysis of EMG data by the EMG system revealed the action potential of muscles. The subjects for the research were 8 in male and female Korean national team weightlifter ; 4 of them male, 4 of female in both sexes. The anlalytic results of the mechanism of the snatch motion were as follows: 1. The vertical displacement of barbell in the snatch, both male, female weightlifter group had the highest vertical displacement of barbell in the 4th step. 2. The vertical displacement of barbell in the weightlifting, the more time of 4th step got short, the more maximum extension effect of body segment large. It was the main reason to increase the added rising height of barbell. 3. The time during the motion in the weightlifting, it was efficient to use possible the shorter time. 4. The moment was loaded in elector spinae(L5, S1) joint, there was showed a rapid increase of extension moment in the 2nd step. 5. In the EMG analysis, snatch in male weightlifter, commonly was very higher used in order of vastus lateralis muscle(1st step), biceps femoris muscle(2nd step), trapezius muscle(4th step), and elector spinae(2nd step).