• 생명과학회지
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• 제22권5호
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• pp.665-670
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• 2012

이 연구는 자연발생고혈압쥐(SHR)의 혈압, 골격근에서의 혈관생성 및 혈관내피세포성장인자 발현(VEGF)에 미치는 지구성운동의 효과를 조사하였다. 5주령 SHR와 WKY는 무작위로 정상혈압군(WKY, Wistar-Kyoto rat, n=9), 고혈압통제군(SHR-C, SHR Control, n=9) 및 고혈압운동군(SHR-E, SHR Exercise, n=9)으로 각각 분류하였고, 지구성운동은 트레드밀을 이용하였다(12-20 m/min, 0% grade, 60 min/day, 5 days/wk, 16 wk). 수축기혈압은 지구성운동에 의해 효과적으로 감소되었다(SHR-E vs. SHR-C, $p$ <0.05). 골격근의 모세혈관밀도와 VEGF 단백발현은 고혈압통제군(SHR-C)이 정상혈압군(WKY)보다 모두 감소되었으나, 지구성운동(SHR-E)이 고혈압통제군(SHR-C)에 비해 모두 증가되었다. 이러한 결과들은 지구력운동 트레이닝이 SHR 골격근의 VEGF 단백발현의 증가를 통해 모세혈관밀도를 향상시키고, 이러한 모세혈관밀도의 향상이 SHR의 혈압상승을 억제할 수 있다는 것을 의미한다.

• 대한물리의학회지
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• 제14권3호
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• pp.134-141
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• 2019

PURPOSE: This study conducted aA forward-looking study of elite water polo athletes, who trained at National Training Center, was conducted to determine the correlation between the incidence of sports injuries and the bone density among national water polo players. METHODS: Data on the general characteristics of all study subjects were analyszed usingin descriptive statistics. The incidence of sports injuries was calculated from the incidence of sports injuries per 1,000 hours and the incidence of sports injuries resulting from exposure to 1,000 training sessions. The incidence of all sports injuries was calculated with a 95% confidence interval. Furthermore, Pearson's correlation was calculated conducted to determine the correlation between sports injuries and bone density, bone mass and body composition. RESULTS: Water polo athletes suffered a total of 127 sports injuries in the three-year period, while the athletes suffered 3.5 sports injuries each year. The Ooverall injury rate of 3.2(95% CI 2.68-3.81) per 1,000h, 18.0(15% CI 14.89-21.16) of sports injuries per 1,000AE. For all athletes, 50.4% of the injuries were classified as mild, followed by moderate (26.8%) and severe (22.8%). The lower the bone density in all areas of sports injuries, the higher the incidence of sports injuries. In addition, and the lower the bone mass in all areas except for light injuries, the higher the incidence of sports injuries. CONCLUSION: In tThe correlation between sports injuries and bone density and bone composition of water polo athletes, revealed a significant correlation between the bone density and bone mass were statistically significant, and the lower the bone density and bone mass, the higher the incidence of sports injuries.

• International Journal of Internet, Broadcasting and Communication
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• 제15권1호
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• pp.177-183
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• 2023

The purpose of this study was to examine the effects of 8 weeks of resistance exercise on gait-related abilities and the differences in age groups to provide reference materials for application of training by age group. Subjects in their 30s, 40s, and 50s were recruited and subjected to a lower extremity exercise, in which the intensity gradually increased three times a week for eight weeks. The gait-related variables, torque at 0.18 sec, acceleration time, and torque at 30°, were assessed through isokinetic tests before and after the 8-week training. The torque at 0.18 sec showed a significant increase in the 50s group. There was no significant difference in acceleration time according to time and group. The torque at 30° showed a significant increase in the 30s group. In conclusion, 8 weeks resistance training can increase neuromuscular activity in adults in their 50s group, and changes in training variables are needed to increase torque at 30° that affects knee stabilization in adults over 40s group.

• 웰빙융합연구
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• 제5권2호
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• pp.15-19
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• 2022

Purpose: This pilot study aimed to clarify features of motor module during walking in exercise experts who experienced lately repeated training for sports skill. To identify motor modules, autoencoder machine learning algorithm was used, and modules were extracted from muscle activities of lower extremities. Research design, data and methodology: A total of 10 university students were participated. 5 students did not experience any sports training before, and 5 students did experience sports training more than 5 years. Eight muscle activities of dominant lower extremity were measured. After modules were extracted by autoencoder, the numbers of modules and spatial muscle weight values were compared between two groups. Results: There was no significant difference in the minimal number of motor modules that explain more than 90% of original data between groups. However, in similarity analysis, three motor modules were shown high similarity (r>0.8) while one module was shown low similarity (r<0.5). Conclusions: This study found not only common motor modules between exercise novice and expert during walking, but also found that a specific motor module, which would be associated with high motor control ability to distinguish the level of motor performance in the field of sports.

• Journal of Sport and Applied Science
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• 제4권2호
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• pp.1-9
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• 2020

Purpose: This study sought to investigate the critical features of Word of mouth (WOM) advertising and their impact on sport consumer behavior. Research design, data, and methodology: Target population of the study consisted of all sports consumer of the Federation of Special Patients and Organ Transplantation, Tehran (Iran), who had indirectly watched the World Organ Transplant Competition documentary at least once on others' advice. For this purpose, 360 sports consumers of the federation were purposefully selected and they were asked to complete the standard WOM advertising questionnaire of Asda and Ko. Pearson correlation coefficient test and modeling of structural equations were performed using Spss24 and Smart PLS software at an error level of 0.05 used to analyze the data. Results: The findings show that there is a significant relationship between experience and expertise, trust and validity, content richness, and the power of message transmission through WOM advertising and its predictability. Finally, interpersonal relationships and work involvement also had a moderating role in this regard. Conclusions: The general conclusion is that the components of WOM advertising as well as involvement and homophily with the mediating role directly as one of the presuppositions for persuasion. The sports consumer was promoting WOM.

• 한국게임학회 논문지
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• 제14권4호
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• pp.87-94
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• 2014

최근 골프 시뮬레이터의 급성장과 함께 체감형 스포츠 시뮬레이터에 대한 관심이 높아지고 있다. 우리는 가상현실 기술을 이용하여 초보자 대상의 스노우보드 시뮬레이터를 개발하고자 한다. 본 논문은 스노우보드 훈련을 위해 상호작용하는 가상코치와 현실감 높은 가상의 스포츠 훈련환경을 제안한다. 가상코치는 5가지 기본동작에 대한 직관적인 안내와 맞춤형 코칭 피드백을 제공한다. 가상 훈련환경은 보다 사실적인 훈련 상황을 생성하기 위하여 입체영상 시스템과 모션플랫폼을 이용한다. 우리는 가상현실이 태권도, 야구, 양궁 등의 많은 스포츠 종목에서 훈련 지원을 위해 이용될 것으로 기대된다.

• 디지털융복합연구
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• 제13권10호
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• pp.579-586
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• 2015

어린 초등학교 2~6학년 학생들을 대상으로 과학적이며, 체계적인 훈련을 지원하기 위하여 전국 권역별 대학교를 중심으로 체육영재센터를 운영하고 있다. 이를 위하여 초등학생 2~6학년을 대상으로 기초체력 및 잠재력 검사를 통해 선발운영토록 한다. 하지만 현재 시행 중인 이러한 선발방법은 체육영재 학생들에 대한 질적 평가는 포함되어 있지 않으며, 특히 측정시점에서의 체력, 체격요인에 의하여 상위 순위에 의하여 체육영재를 선발하는 방식으로써 대상 학생들에 대한 잠재적 능력의 평가 및 내재적 평가는 포함되어 있지 않다. 이에 본 연구에서는 윤영길(2011)의 경기지능을 바탕으로 체육영재의 잠재력을 평가할 수 있는 관찰방법에 기초한 영재성 판별 도구를 개발하고자 하였다. 이를 위하여 2회에 걸친 전문가 협의를 통해 체육영재 판별을 위한 하위요인을 추출하였으며, 추출된 하위요인을 바탕으로 현장 지도자들의 관찰방법에 기초한 훈련지능, 학습능력, 실천지능의 요인별 16개의 평가문항을 개발, 제시하였다. 제시된 평가문항은 체육영재 학생들의 질적 평가에 도움이 될 것이며, 아울러 체육영재 선발을 위한 내재적 평가 방법으로의 활용도 기대해 본다.

• 대한치과보철학회지
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• 제45권4호
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• pp.534-545
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• 2007

Statement of problem: In spite of increasing sports injury, there was no collected data on the rate and type of dental injuries for athletes in Korea. Purpose: The purpose of this study was to investigate the occurrence of maxillofacial injuries and attitude of college sports player in Korea towards mouthguard. Material and methods: Total 617 athletes answered a series of questionnaire concerning their sports injury and using mouthguard. Results: 1. 81%(502) of athletes had, playing or training a sports, suffered an injury. Female athletes suffered an injury more than male athletes(p<0.05). Contact sports athletes were injured more than non contact sports athletes(p<0.05). 2. 335 athletes(54.8%) had suffered maxillofacial injuries while playing or training. 81.8% of athletes suffered an maxillofacial injury in contact sports(p<0.05). 3. Laceration of oral area, wrick in neck, fracture or avulsion on upper incisors, concussion, TMJ injury, fracture or avulsion on lower incisors, fracture or avulsion on lower molars were frequently injured area. 4. 67.2% of athletes answered that mouthguard could prevent sports injury especially high in contact sports(p<0.05). But only 39.1% of athletes required mouthguard while playing. 44.6% of athletes showed their intention of using mouthguard. Conclusion: This study shows that the incidence of maxillofacial injuries is very high while the actual use of mouthguard is very low. To prevent sports injury, a dentist must inform sports players and coaches of accurate information about mouthguard so that they can use it well. A dentist also has to provide them with better mouthguard on the basis of user's complaint.

• 한국운동역학회지
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• 제25권3호
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• pp.343-351
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• 2015

Objective : The purpose of this study was to investigate the effects in the muscle function following 8-week dead-lift training with Whole-body Vibration(WBV) in rehabilitation for sports players. Method : Twenty young sports players. Each subjects were randomly assigned to a resistance training with Whole-body vibration group(TG, n=10), a resistance training without Whole-body vibration group(CG, N=10). The measurements which physical fitness test and joint torque test were performed before the randomization and after the 4-week and 8-week. The WBV group performed the dynamic Dead-lift exercise on a vibration platform during one minute. The CG group performed the equal training without vibration. The WBV and CON group repeated 5 set and trained two times weekly for 8-weeks. Paired t-test was used to test for differences between the groups at baseline and after 4-weeks and 8-Weeks. And independent t-test was used to test for differences between the groups at TG and CG. All analyses were executed using SPSS software 18.0. The level of significance was set at p<.050. Results : Following the 8-Weeks training sessions, an increase in the back-muscle strength was found to be greater for the TG compared with the CG group(p<.05). Muscle endurance was significantly decreased after training than before training only for the CG(p<.05). Isometric Hip/Lumber Extension/Flextion measurement was found to be significantly greater for the TG compared with the CG group(p<.05). The finding indicates that WBV effects as an efficient training stimulus to enhance muscle function by facilitating neural control trail. Following muscle activation in motor unit synchronization of the co-contraction of the muscles. Conclusion : The results imply that the WBV training may have enhanced muscle function in rehabilitation for sports players.

• 한국운동역학회지
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• 제24권3호
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• pp.309-315
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• 2014

The aim of the present study was to investigate the effects of 6-week wrist resistance training on wrist torque control. Nineteen subjects were randomly assigned to either the wrist training group (n=9) or the control group (n=10). The training group performed wrist exercises for six directions (flexion, extension, pronation, supination, radial deviation, and ulnar deviation) while the control group did not. Testing for the isometric torque control error, one-repetition maximum (1-RM) strength, and isokinetic maximum torque (angular velocity of $60^{\circ}/s$ wrist movements) were conducted before and after six weeks of resistance training and after every two-week interval of training. The wrist training group showed significant decreases in isometric torque control error in all six directions after the 2-week resistance training, while the control group did not show significant increase or decrease. The training group showed significant increases in the maximum strength in all six directions assessed by 1-RM strength and isokinetic strength tests after the 4-week resistance training, while the control group did not show any statistically significant changes. This study shows that motor control ability significantly improves within the first two weeks of resistance training, while the wrist strength significantly improves within the first four weeks of resistance training in wrist training group compared to the control.