The purpose of this study is to verify the differences on power generation of lower limb and the optimum frequency to maximize the power. The verified data will be provided to the sports scientists, supervisor, trainer and player who need the improved...
The purpose of this study is to verify the differences on power generation of lower limb and the optimum frequency to maximize the power. The verified data will be provided to the sports scientists, supervisor, trainer and player who need the improved lower limb power as the basic scientific data and contributed to their performance enhancement.
The subject of this study was chosen as 10 able-bodied male students in college on N university, Chungcheongnam-do, whom there is no medical history about motor disturbance, paresthesia, nervous system, musculoskeletal system, and listened about the purposes, methods and risks of study, and written the participation agreement. Using random sampling method, 10 subjects kept an upright posture on the Turbo-Trainer during 5 minutes as the frequency of 8㎐, 26㎐, 40㎐ in order to fit each order, and then practiced 5 times multiple jump on the Accupower for measuring the lower limb power, finally measured peak power and mean power, peak jump height and mean jump height through the ground reaction force.
Using SPSS 18.0, the data process of this study calculate as mean(M) and standard deviation(SD) of all measured value, use one-way ANOVA repeated measure in order to verify the significant difference between maximum power, mean power and peak jump height, mean jump height at each frequency, and if see a significant difference between group, practice the LSD for posteriori test. The significant level of hypothesis verification is set-up as α=.05.
The result of this study are follows.
1) The maximum power changes according to the frequency during whole body vibration.
(1) The maximum power of whole body vibration showed significant differences at the 26㎐ only compared with before implementation(p <.05).
(2) The difference of maximum power during whole body vibration according to frequency showed (p<.05) at 26㎐, (p<.001) at 8㎐ and (p<.01) at 40㎐.
2) The mean power changes according to the frequency during whole body vibration.
(1) The mean power of whole body vibration showed significant differences at the 26㎐ only compared with before implementation(p <.05).
(2) The difference of mean power during whole body vibration according to frequency showed (p<.05) at 26㎐, (p<.05) at 8㎐ and (p<.01) at 40㎐.
3) The peak jump height changes according to the frequency during whole body vibration.
(1) The peak jump height of whole body vibration showed significant differences at the 26㎐ only compared with before implementation(p <.01).
(2) The difference of peak jump height during whole body vibration according to frequency showed (p<.01) at 26㎐, (p<.01) at 8㎐ and (p<.01) at 40㎐.
4) The mean jump height changes according to the frequency during whole body vibration.
(1) The mean jump height of whole body vibration showed significant differences at the 26㎐ only compared with before implementation(p <.01).
(2) The difference of mean jump height during whole body vibration according to frequency showed (p<.01) at 26㎐, and (p<.05) at 40㎐.
According to above conclusion, during whole body vibration according to frequency affect to lower limb power at 26㎐, the optimum frequency except mean jump height has verified at 26㎐ due to the significant difference has been appeared at the maximum power, mean power, peak jump height except mean jump height. Therefore, this study is provided to sports scientist, supervisor, coach, trainer and player whom need the enhancement of lower limb power as scientific basic data and will be contributed to their performance enhancement.