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Lower-Extremity Plyometric Training Improves Postural Stability in Young Male Athletes
서병도,신형수,권태윤 한국자료분석학회 2010 Journal of the Korean Data Analysis Society Vol.12 No.6
The purpose of this study was to identify the effect of plyometric training on the postural stability of collegiate soccer players. The study was performed on 21 collegiate soccer players(in their 20s) for 12 weeks, from April 2010 to June 2010. A one-group pretest-posttest design was used for the study. To compare the pre- and post-training, a paired t-test was performed. The mean ST significantly improved. It is believed that plyometric training can improve the postural stability of soccer players and can be used as a training program for the rehabilitation of injured soccer players.
견관절의 유착성 관절낭염 환자에 대한 자가신장운동의 효과
서병도,신형수 대한물리치료학회 2010 대한물리치료학회지 Vol.22 No.1
Purpose: The purpose of this study was to compare the effectiveness of (a) a self stretching exercise (SSE) maintained below the level of pain with (b) physical therapy (PT) performed without pain limitation in patients with adhesive capsulitis. Methods: Forty-three subjects with frozen shoulder were recruited. Subjects were randomly assigned to one of two groups ? an experimental group (SSE group, n1=18) and a control group (PT group, n2=25). The duration of each intervention was five weeks. We assessed night pains, range of motion (ROM), and shoulder function. Results: Overall, subjects in both groups improved over five weeks (p<0.05). The change in the PT group was greater (p<0.05). Conclusion: SSE carried out under the pain threshold may be used to treat patients with adhesive capsulitis SSE can be prescribed with PT as part of a home program or of group management.
서병도,신형수,윤종대,한동욱 한국운동역학회 2010 한국운동역학회지 Vol.20 No.1
The purposes of this study were to determine the effects of lower extremity plyometric training on the proprioception and postural stability of collegiate soccer players with postural instability. The study was conducted from April 17, 2009 to September 28, 2009(for a total of 6 weeks). Ten male collegiate soccer players were enrolled into the study, then divided into two groups: the plyometric training group(PMT) and the classical postural stability training group(CPT). Plyometric training on the lower extremities showed statistically significant improvement on proprioception and postural stability(p<.05). Although not all neurophysiologic mechanisms underlying such an effect were revealed, it is proposed that plyometric training can be used as an effective training program to improve functional postural stability in soccer players with preexisting postural instability.
서병도,신형수,Han, Dong-Wook 한국운동역학회 2009 한국운동역학회지 Vol.19 No.4
The primary purpose of this study was to compare the hamstring-to-quadriceps strength(H/Q) ratios in collegiate soccer players and normal age-matched healthy students, and the secondary purpose was to investigate the changes in the H/Q ratio according to the degree of knee flexion. Twenty-five subjects volunteered to participate in this study. The study group comprised 12 healthy male collegiate soccer players, and the control group, 13 healthy age-matched male collegiate students. The modified N-K table was used for isometric strength measurement(unit: N). Mann-Whitney tests were performed to determine the differences in the H/Q ratios of soccer players and age-matched students at different knee flexion angles of the dominant leg. The strength of the hamstring muscle in the study group was significantly lower than that observed in the control group at knee flexion angles of 60° (p<.001), 90° (p<.01), and 120° (p<.05). The strength of the quadriceps muscle in the study group was significantly higher than that observed in the control group at flexion angles of 30° (p<.001) and 60° (p<.05). The H/Q ratios in the study and control groups differed significantly at all angles (60°, p<.001 90°, p<.001 and 120°, p<.001).