• 대한물리의학회지
• /
• 제13권4호
• /
• pp.85-94
• /
• 2018

PURPOSE: This study was conducted to determine the effects of therapeutic exercise on range of motion (ROM), the manual muscle test (MMT), functional movement screen (FMS) and radiological evaluation in a youth football player with football-specific anterior pelvic tilt (APT). METHODS: The subject of this case report was a 12-year-old youth football player, who presented with football-specific APT. Therapeutic exercise consisted of hamstring stretch, prone hip extension, abdominal crunch, bridging with isometric hip abduction, plank exercise with posterior tilt and posterior pelvic tilting exercise using a swiss-ball for 40 min/day, twice a week for 8-weeks. ROM, MMT, FMS (deep squat, hurdle step, inline lunge, shoulder mobility, active straight-leg raise, rotary stability and trunk stability push-up) and radiographs (lumbar lordotic and sacral horizontal angle) were analyzed before and after week 8 of therapeutic exercise. RESULTS: The ROM, MMT, and FMS increased and the lumbar lordotic angle and sacral horizontal angle improved after 8-weeks of therapeutic exercise. CONCLUSION: The results of this case report suggest that therapeutic exercise improves ROM, MMT and radiography associated parameters in youth football players with football-specific APT. These findings have clinical implications for therapeutic exercise in youth football players with football-specific APT.

• Advances in nano research
• /
• 제17권1호
• /
• pp.51-59
• /
• 2024

Nanotechnology, the science of manipulating matter at the nanoscale, offers remarkable opportunities for innovation across various fields. Nanomaterials, which form the cornerstone of advanced materials, drive forward new ideas and groundbreaking applications. In the textile industry, traditional antibacterial and antifungal garments are typically treated with chemical compounds to inhibit bacterial growth. However, these treatments often lack durability, losing effectiveness after multiple washes. To address this limitation, the application of green nanotechnology in developing high-performance textiles emerges as a promising solution. This study explores the integration of nanocomposites into the polymer layers of footballs to enhance their stability and performance. By embedding nanoparticles within the polymer matrix, the durability and resilience of the footballs are significantly improved, leading to better control and performance on the field. This innovative approach not only extends the lifespan of the footballs but also provides economic advantages by reducing the frequency of replacements. Additionally, the enhanced stability contributes to a more consistent and reliable playing experience, promoting improved safety and performance for athletes.

• The Journal of Korean Physical Therapy
• /
• 제28권3호
• /
• pp.189-194
• /
• 2016

Purpose: This study focuses on influence of ankle stabilization training on balance ability and lower limb muscle activation of soccer player with functional ankle instability. Methods: Subjects were grouped into ankle stabilization training group using biofeedback comprised of 15 subjects and general exercise group of 15. The training was conducted for 30 minutes, 3 times a week for 8 weeks in total. All 30 football players conducted plyometric training for 30 minutes before main training. To evaluate balance ability, biorescure was used to measure whole path length and surface area and surface electromyography (EMG) system was used to measure tibialis anterior, tibialis posterior, and soleus to evaluate lower limb muscle activation. Results: The experiment group showed significant difference to the comparison group in regard of whole path length and surface area which represents balancing capability and muscle activation of tibialis anterior, tibialis posterior, and soleus. Conclusion: Therefore, ankle stabilization training using biofeedback is more effective in enhancing balance ability and lower limb muscle activation than general exercise.

• 한국체육학회지인문사회과학편
• /
• 제56권5호
• /
• pp.665-677
• /
• 2017

이 연구는 U-12 유소년 축구선수를 대상으로 운동수행력과 의학적 평가를 상세히 분석한 후에 축구를 통한 운동수행력의 변화 및 의학적 문제점을 파악하는데 그 목적이 있다. 연구대상은 유소년 축구클럽에 참여하고 있는 초등학교 선수를 유소년 축구선수 집단(Youth football players group; YFG, n=15; $11.2{\pm}0.9$ 세)과 축구를 하지 않는 건강한 일반 유소년을 통제 집단(Control group; CON, n=15; $11.5{\pm}0.6$ 세)으로 각각 분류하여 운동수행력(건강관련 체력, 운동관련 체력, 기능적 움직임 및 동적 균형) 및 의학적 평가(하지정렬, 관절가동범위 및 도수근력검사)를 측정하였다. 왕복 오래달리기, 50-m 달리기, 눈 감고 외발서기, 능동적 하지직거상, 회전 안정성 및 비주측의 종합점수는 CON과 비교해서 YFG에서 긍정적인 결과를 보였다. 하지만, 하지정렬에서 주측 및 비주측의 Q각, 관절가동범위에서 비주측의 발목관절 발등굽힘, 주측 및 비주측의 발목관절 발바닥굽힘, 도수근력검사에서 주측의 엉덩관절 폄 및 벌림, 무릎관절 굽힘 및 폄, 비주측의 무릎관절 굽힘 및 폄은 CON과 비교해서 YFG에서 부정적인 결과를 초래하였다. 따라서 이 연구에서 U-12 유소년 축구선수는 부분적으로 운동수행력은 우수하게 나타났지만, 의학적 평가에서는 부정적인 결과를 확인하였다.

• Geomechanics and Engineering
• /
• 재33권6호
• /
• pp.529-542
• /
• 2023

Wave propagation with high transverse deflection could affect the stability of the ball in its trajectory. For low stiffness balls similar to soccer and volleyball balls, the waves are more noticeable in comparison to other balls like ping-pong ball. On the other hand, the soccer balls are under heavy impact loads from shoots and contacting different objects in the field. The maximum recorded speed of a soccer ball after kicking is the 211 km/hr and the average maximum speed is around 112 km/hr. Therefore, in such speeds the aerodynamic forces become important which are directly related to geometrical shape of the ball. In this regard, the wave propagation in soccer ball is examined in the current study using large deformation shear deformable formulations. Classical relations of stress-strain components are taken into consideration along with minimum total energy principle. The final derived relations were solved by using harmonic differential quadrature method. The results are generally presented ion term of phase velocity as function of different influencing parameters of the materials, geometry and mass of the ball.

• 대한통합의학회지
• /
• 제9권4호
• /
• pp.71-83
• /
• 2021

Purpose : This study compared the differences in power and agility of athletes in each sports using visual response speed test (VRST) scores after conducting 10 weeks of body stability exercise (BSE) on elementary school athletes in handball, football, volleyball and conducted a post-hoc test on the measured values. The subjects of this study were baseball (n=27), taekwondo (n=22), and football (n=23) athletes with at least two years of athletic experience. A total of 72 elementary school athletes were measured by VRST after 10 weeks of BSE under the same conditions. Methods : For VRST measurement of the upper extremity, the right and left hands were alternately touched in the order the blazepod equipment lights were turned on. The number of touches for 15 seconds and response touch were measured. In the case of the measurement of lower extremity the left lower extremity was measured first when the Blaze pod equipment light came on. The average value was obtained by measuring 3 times using a measurement sensor with the position indicated in order to measure the upper arms and legs the same. Results : This study confirmed homogeneity among sports and that VRST improved after implementing BSE for sports. However, no statistically significant difference was identified when comparing VRST improvements between sports, and post-hoc test results showed no significant differences either. Conclusion : After applying the BSE program under the same conditions for 10 weeks to elementary school students who can improve their power and agility the most, the results of the examination using the Blaze pod showed that the power and agility of baseball, taekwondo, and soccer players were similarly improved. From the fact that there was no significant difference among sports, it could be inferred that the BES training program could improve VRST without being limited to some sports.

• 디지털융복합연구
• /
• 제20권1호
• /
• pp.191-202
• /
• 2022

본 연구의 목적은 고등학교 남자 축구선수 24명을 대상으로 10주간 신체안정화운동 프로그램 중재 후 기술체력에 미치는 영향을 규명하는 것이다. 블레이즈포드로 시각반응속도 검사를 시행한 결과 위팔, 왼발, 오른발의 15초간 반응횟수와 반응시간(p<0.001)은 유의하게 증가하였다. 기능적 움직임 평가하기 위해 7가지 동작의 향상 여부 평가결과 허들건너기(p<0.001), 능동적폄다리올리기(p=0.022) 동작이 유의하게 향상되었다. 균형능력을 평가하기 위해 와이발런스 평가결과 양쪽 복합점수(p<0.001)가 유의하게 향상하였다. 기동력과 근지구력을 평가하기 위해 폐활량 측정결과 노력성폐활량(p<0.001)과 1초간 강제날숨량(p=0.003)이 유의하게 향상되었다. 10주간 신체안정화운동 중재 후, 경기에 필요한 기술 체력인 순발력, 민첩성, 다리 근력, 다리의 안정성, 기동력, 근지구력을 효과적으로 향상할 수 있다는 결론을 얻었고, 이러한 기술체력의 향상은 축구선수들의 부상을 방지할 수 있으며, 경기력을 향상할 수 있을 것이다.

• 대한물리치료과학회지
• /
• 제11권4호
• /
• pp.5-10
• /
• 2004

This study selected 10 university football male players and repeatedly treated them as sports massage group, exercise resumption group, and stability resumption. After maximum exercise, when sport massage, exercise resumption, and stability resumption were applied during recovery, blood lactic acid concentration and $LDH_5$ isozyme concentration were examined. Finally this study obtains the following conclusion 1. There was a significant difference in both lactic acid concentration and time between groups. Besides, the cross-action on group and time was significant. 2. There was a significant difference in both $LDH_5$ concentration and time between groups. Besides, the cross-action on group and time was significant. Based on the above findings, this study suggests that sport massage resumption and exercise resumption remove blood lactic acid more quickly than stability resumption to promote recovery. That means that sport massage and exercise resumption anre very effective for lowering the level of fatigue. Thus sport massage or exercise resumption treatment is considered to have a very positive effect on player's quick recovery and it should be used aggressively in a field.

• The Journal of the Acoustical Society of Korea
• /
• 제23권3E호
• /
• pp.91-97
• /
• 2004

In this paper, we propose a classification system of TV program scenes based on audio information. The system classifies the video scene into six categories of commercials, basketball games, football games, news reports, weather forecasts and music videos. Two type of audio feature set are extracted from each audio frame-timbral features and coefficient domain features which result in 58-dimensional feature vector. In order to reduce the computational complexity of the system, 58-dimensional feature set is further optimized to yield l0-dimensional features through Sequential Forward Selection (SFS) method. This down-sized feature set is finally used to train and classify the given TV program scenes using κ -NN, Gaussian pattern matching algorithm. The classification result of 91.6% reported here shows the promising performance of the video scene classification based on the audio information. Finally, the system stability problem corresponding to different query length is investigated.

• 대한정형외과스포츠의학회지
• /
• 제1권1호
• /
• pp.31-36
• /
• 2002

목적: 운동중에손상당한전방십자인대에대해아킬레스동종건을이용한재건술시행후임상적결과와운동력회복정도를조사하였다. 대상및방법: 전방십자인대손상을입은5년이상스포츠활동을한아마추어로1주일에3회이상1회에2시간이상운동을하였던환자에서아킬레스동종건을이용하여관절경하에전방십자인대재건술을시행한환자중1년이상추시가능한56명에대하여 외상 전의 스포츠활동으로의 회복여부를 주관적, 객관적 지표인Lysholm Knee Score, Tegner activity Score, Telos stress arthrometer, modified Feagin Scoring System 등을분석하였다. 평균연령은25세(18 $\~$49세), 평균추시기간은15개월(12개월 $\~$19개월)이었다. 손상시운동은축구가29명, 농구14명, 배드민턴5명, 테니스3명, 스쿼시2명, 기타3명이었다. 결과: Lysholm Knee Score는술전60점에서88.2으로, Telos arthrometer를이용한스트레스사진상술전7.1 mm에서술후2.3 mm로향상된결과를보였다. Modified Feagin Scoring System상양호이상이52례(88.1$\%$)이었다. 운동력의회복평가에서Tegner 6 단계인레크레이션스포츠가가능한경우가12명, Tegner 5단계20명, Tegner 4단계20명, Tegner 3단계3명이었다. 결론: 아킬레스동종건을이용한전방십자인대재건술후임상적결과는좋은결과를보이고있으나, 외상전의스포츠활동으로의복귀는충분하지않음을보여주고있어정상적인스포츠활동을위해많은연구가필요할것으로사료된다.