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남윤신(Nam Youn-Shin),이청무(Lee Chung-Mu) 한국체육과학회 2003 한국체육과학회지 Vol.12 No.2
The purpose of this study was to suggest an alternative plan for the relief and prevention of premenstrual syndrome. Menarche, age, and exercise frequency were examined for this study. Subjects were randomly sampled and collected from both 312 participants at sports centers and 353 non-participants. The questionnaire was based on Abram/s(1982) and general questions were added. Data were analyzed by one-way ANOVA and post-hoc methods. Results are as the following: First, Menarche ages of 14~16 years old are the lowest in premenstrual syndrome among all subjects. Behvior group is significantly different. Second, as subjects are getting old, the premenstrual syndrome is reduced. There is significant difference between symptom groups except concentration group. Third, as subjects are more rigirously exercising, the premenstrual syndrome is greatly reduced and there is significant difference between frequency of exercise. Consequently, exercise is one of the most effective ways to relieve and prevent premenstrual syndrome.
태권도 선수의 광자극에 의한 근전도 반응시간 및 전기 역학적 지연에 관한 연구
김민정(Min Jeong Kim),나정선(Jung Sun Na),이청무(Chung Mu Lee) 한국여성체육학회 2001 한국여성체육학회지 Vol.15 No.2
The purpose of this study is to compare/analyze the differece of $quot;Pre motor time(PMT)$quot; and $quot;Electromechanical delay(EMD)$quot; in maecimum isometric contraction between trained Taekwondo players and untrained man. this study can be concluded as follows 1. Trained players had 20msec earlier PMT than untrained people, but this difference was not significant statistically. 2. EMD was also shoter for trained players than untrained man, but this difference was of no statistical significance. 3. $quot;Total Reaction Time(TMT)$quot; was shoters for trained players than untrained man, which was also of no statistical significance. 4. Trained players had about O.QQ3 Arbitary unit lower than untrained man electric efficiency of muscles, which was not significant statistically. All in all, this study suggests that although training is not a whole factor determining PMT or EMD, it may affect them more or less and that other factors such as ratio of muscle-fiber formation, time of strength increasing and decreasing may as well be attributable to determining PMT or EMD if interacted with training.