원문정보
초록
영어
Repetition of landing with visual control in sports and training is common, yet it remains unknown how landing with visual control affects postural stability and lower limb kinetics. The purpose of this study was to test the hypothesis that landing with visual control will influence on lower limb control for intrinsic dynamic postural stability. Kinematics and kinetics variables were recorded automatically when all participants (n=10, mean age: 22.00±1.63 years, mean heights: 177.27±5.45 cm, mean mass: 73.36±2.80 kg) performed drop landings from 30 cm platform. Visual control showed higher medial-lateral force, peak vertical force, loading rate than visual information condition. This was resulted from more stiff leg and less time to peak vertical force in visual control condition. Leg stiffness may decrease due to increase of perturbation of vertical center of gravity, but landing strategy that decreases impulse force was shifted in visual control condition during drop landing. These mechanism explains why rate of injury increase.
목차
1. Introduction
2. Material and Methods
2.1 Subjects
2.2 Experimental Approach
2.3 Definition of Analysis Phase
3. Results
3.1 Kinetics and elapsed time of stabilization
3.2 Angle of lower limb from sagittal plane
3.3 Stability index of posture
4. Discussion
5. Conclusion
References