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류종우(Jong Woo Ryu),강년주(Nyeon Ju Kang),김수혁(Soo Hyuk Kim),신영호(Young Ho Shin),강호율(Ho Youl Kang),곽혜은(Hye Eun Kwak) 한국사회체육학회 2012 한국사회체육학회지 Vol.0 No.48
This study was to determine how the angular velocity affects muscle activity during the knee joint isokinetic contraction. Twelve male university students were recruited as the subjects. Four pairs of surface electrodes were attached to the right-hand side of the body to monitor the rectus femoris (RF), vastus lateralis (VL), vastus medialis (VM), biceps femoris (BF). Subjects performed the knee joint isokinetic contraction for 3 minutes in each angular velocity (30 °/sec, 120 °/sec, 240 °/sec). In each angular velocity, the peak torque of a knee joint extensor muscle according to the angular velocity to the exercise duration decreased more significantly in the angular velocity 240 °/sec than in the 30 °/sec and 120 °/sec in each exercise duration and also decreased more significantly in the velocity 120 °/sec than in the 30 °/sec in two min. and three. The average torque of a knee joint extensor muscle in the 240 °/sec decreased more significantly in two min. and three than at the first time check. In the velocity 120 °/sec and 240 °/sec, the peak and average torque of a knee joint flexor muscle according to the exercise duration decreased more significantly in all exercise duration than at the first time check. When it comes to the change of the muscle activity according to the angular velocity, the peak IEMG (Integrated electromyography) of the RF, VL, VM, and BF decreased as the angular velocity increased, whereas the average IEMG increased with the angular velocity increasing. In the angular velocity 240 °/sec, the average torque of the extensor muscle significantly decreased, whereas the average IEMG of RF and VM significantly increased. During the constant velocity movement, the increase of the angular velocity makes the average IEMG increase. During the high velocity movement, the torque decreased while the average IEMG of RF and VM increased.
공기권총 사격 시 스포츠 테이핑의 적용이 상지근 근활성도에 미치는 영향
류종우(Jong Woo Ryu),유동훈(Dong Hoon Yoo) 한국사회체육학회 2012 한국사회체육학회지 Vol.0 No.48
The purpose of this study was to determine the effects of sports taping on muscle activity of upper extremity during air pistol shooting. Nine male students, no musculskeletal disorders and no shooting experiences, were recruited as the subjects. Shooting training was continued for 12 weeks using Coaching machine (ZAO co., Russia) by a coach who was a member of nation shooting player. Each participants performed ten shots for the two conditions (WOT: Without Taping, WT: With Taping, attached sports taping: Kinesio Tex 5cm, Kinesio, Japan). In order to accessing to the muscle activity the mean and peak IEMG were calculated for each trial. The result of the Coaching machine scores was increased 20% than be fore shooting training. The WT score was higher than WOT points. Peak IEMG on WT of DP shape, muscle activity of upper extremity, was lower than that of WOT. SP shape of trapezius on WT was lower than that of WOT. Non-athletes with taping were similar to muscle activity of athletes on air pistol shooting. Therefore Air pistol shooting on sports taping can be effective for air pistol shooting. The study suggest research on elite players is needed on the relation between air pistol shooting and taping.
상지 근피로가 권총 사격 수행 시 심박수와 EEG에 미치는 영향
류종우(Jong-Woo Ryu),김판수(Pan-Soo Kim) 한국생활환경학회 2014 한국생활환경학회지 Vol.21 No.6
The purpose of this study was to investigate the effects of upper extremity muscle fatigue on the heart rate and EEG during a pistol shooting. Eight elite male players (27.1 ± 2.7 yrs, 77.0 ± 3.6 kg, 172.6 ± 2.0 cm) with members of the national team volunteered for this study. The exercise repetitions for upper-extremity fatigue was individually determined at isokinetic machine at 7 days prior to experimental day. The isokinetic exercise was performed until the constant level of work output at speed of 120 °/sec and the range of 10o ~ 100o. At the experimental day, all subjects performed the 3-set fatigue exercises with 60s resting interval between sets and then immediately started the 10-m pistol shooting with 20 shoots for 300s at the coach machine with heart rate and EEG monitors. The shooting time and the aiming period were significantly decreased but the aiming distance was significantly increased after exercise when compared with those of non-fatigue status (p < 0.05). The fluctuation of heart rate was significantly increased during shooing performance (p < 0.05). The alpha wave at T3 of EEG was significantly elevated after fatigue exercise, but not at T4 of EEG. Therefore, the study showed that the upper extremity muscle increased heart rate and T3 with deteriorating shooting performance.
류종우(Ryu, Jong-Woo) 새한철학회 2015 哲學論叢 Vol.79 No.1
들뢰즈는『칸트의 비판철학』에서 크게 두 가지를 의도한다. 그는 한편으로 칸트의 삼비판서를 체계적으로 통일시키고자 하며, 다른 한편으로 칸트의 철학에 대한 비판을 수행하고자 한다. 본고에서는 사유의 이미지로서 공통감각 비판이라는 관점에서 들뢰즈의 두 번째 의도에 중점을 두고 논의를 전개한다. 칸트는『순수이성비판』과『실천이성비판』에서 선험적 공통감각들을 제시하는데, 이 선험적 공통감각들 속에서 모든 능력들은 하나의 지배적 능력이 규정하는 대로 조화롭게 일치한다. 그러나 이러한 능력들의 일치는 단순히 선험적일 뿐이라는 점에서 임의적이며, 만약 그것이 필연적이기 위해서는 마땅히 정당한 근거를 가져야만 한다. 들뢰즈는 선험적 공통감각을 와해시키고 또한 그것의 궁극적인 근거를 이루는 발생적 공통감각의 실마리를 칸트의『판단력비판』에서 찾는다. 거기서 능력들의 일치는 능력들이 하나의 지배적 능력에 의해 규정되지 않고 자유롭게 활동하는 가운데서 발생한다. 이때 능력들의 일치를 이루는 원리는 능력들의 불일치이며, 이 능력들의 충돌에서 기인하는 폭력이 능력들로 하여금 실행하도록 강요함으로써 능력들의 발생적 일치로서 ‘불일치의 일치’를 창조한다. Roughly Deleuze intended two things in Kant’s Critical Philosophy. He intended to synthesize Kant’s three critiques systematically, on the other hand he intended to criticize for Kant’s philosophy. In this study, I’m willing to put emphasis on the second for discussion in terms of criticism of the common sense, the image of thought. Kant presented a priori common senses in Critique of Pure Reason and Critique of Practical Reason. In these a priori common senses, all faculties are accorded harmoniously by the legislation of a predominant faculty. But this harmony of faculties is arbitrary because of its apriority. If it is necessary, it ought to have reasonable basis. Deleuze found a clue of the genetic common sense that makes collapse the a priori common sense and gives an ultimate basis of it in Critique of Judgement. There a harmony of faculties is generated while the faculties aren’t regulated by a predominant faculty and act freely. This discord of faculties is the principle for the harmony of faculties. In other words, the violence that is caused by the conflict between faculties creates ‘discordant harmony’ as the genetic harmony of the faculties by forcing them to exercise.
권총사격 시 상지 근피로 유발 수준에 따른 사격수행에 미치는 영향
류종우(Ryu, Jong-Woo),강호율(Kang, Ho-Youl) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.5
The purpose of this study was to investigate the effects of the upper limb muscle fatigue on the pistol shooting performance. Seventeen elite male players with members of the Korea national team were recruited for this study. Group A (23.0 ± 2.2 yrs, 68.4 ± 3.4 , 172.2 ± 1.4 cm) and Group B (27.1 ± 2.7 yrs, 77.0 ± 3.6 kg, 172.6 ± 2.0 cm) were randomly categorized. Both groups performed ten shots freely for 150 s toward the electronic target which was SCATT (SCATT Co., Russia). Group A took 1-set muscle fatigue exercise and group B did 3-set muscle fatigue exercises. After completed the 1-set or 3-set muscle fatigue isokinetic exercise on cybex (Humac Co., USA), all subjects immediately performed the shooting to electric target. In the group 4 the shooting time was significantly increased and the aiming period was inversely decreased (p<0.05), but the shooting score and aiming time was not affected from 1-set muscle fatigue exercise. However, in the group B, all variables (shooting time, aiming period, shooting score, and aiming time) were significantly decreased after 3-set muscle fatigue exercises (p<0.05). Maximum integrated EMG of deltoids and triceps were significantly increased at both groups A and group B after muscle fatigue exercise (p<0.05). Especially, in the group B, the triceps brachii was only significantly increased. Although the average integrated EMG was not significantly different in muscle fatigue exercise at the both groups, deltoids and triceps were relatively increased without the statistical significance. Therefore, the results of the current study suggest that the elite players elongate the aiming time to avoid the deteriorating shooting score in the weak level of muscle fatigue, but decrease both the aiming and the aiming time, and increase the aiming period with the deterioration of shooting score in the high level of muscle fatigue.