Effect of Support Surface Quality for the Squat Exercise on Vertical Jump Performance

Abstract

Background: This study investigated the effect of support surface quality, stable vs unstable, for 6-week long squat exercise program on vertical jump performance. Method: The subjects were 24 healthy students who agreed to participate in this study. They divided into stable support surface group and unstable support surface group randomly. The squat exercise was performed three times of a week for 6 weeks. The height of each jump was measured by the height marked on the grid paper with the middle finger of the subject. Muscle strength was used to measure maximum voluntary isometric and isotonic contraction during knee extension. Balance (eyes-opened and eyes-closed one-leg standing balance tests) was performed alternately on the right and left legs.Results: Vertical jump was significant difference stable support surface group with unstable support surface group. Conclusion: These results indicate that vertical jump of stable support surface group was more improved than unstable support surface group.