근력 훈련이 다운증후군 아동의 지면반력의 변화에 미치는 영향

임비오,한동기 한국운동역학회 2002 한국운동역학회지 Vol.12 No.2

본 연구의 목적은 다운증후군 보행에 영향을 주는 근력 훈련이 성장기에 있는 다운증후군 아동의 지면반력의 변화에 미치는 효과를 살펴보는 것이다. 본 연구의 대상자는 삼염색체 다운증후군을 가진 남자 아동(11세~13세) 8명이며, 근력훈련 전에 지면반력 변인(수직력, 전후력, 좌우력, 총압력중심)을 측정하였으며 근력훈련 후에도 동일한 방법으로 지면반력 변인을 측정하였다. 지면반력 변인의 측정은 2대의 AMTI 지면반력기를 사용하였으며, 초당 100Hz로 데이터를 수집하여 분석하였다. 근력 훈련은 하지 근육 강화 훈련 4종목(스쿼트, 레그 컬, 레그 익스텐션, 토 레이즈)과 복근 및 척추기립근 강화 훈련 2종목(하이퍼 익스텐션, 윗몸 일으키기)으로 구성하여 8주간 주당 3회, 1회 운동 시 10~15RM×3세트로 점증부하 원리에 의거하여 실시하였다. 본 연구를 통한 결론은 다음과 같다. 근력 훈련 전후의 수직력, 전후력, 좌우력의 변화패턴은 다운증후군 아동별로 다양하게 나타났으며, 근력훈련으로 정상인과 비슷한 패턴으로 향상되었다. 또한, 훈련 전 · 후의 총압력중심의 이동궤적은 연구대상자별로 다양한 이동궤적이 나타나서 명확한 설명을 하기가 어려우며, 이에 대한 보다 종합적인 후속 연구가 필요할 것으로 사료된다. 본 연구를 통하여 다운증후군 아동들의 보행의 운동역학적 기전의 이해와 운동학적 결과의 해석을 돕고 향후 병적 보행의 평가에 대한 기초자료를 제시할 수 있을 것으로 사료된다. The purposes of this study were to investigate the effects of strength training on the change of ground reaction force for the children with trisomy 21 Down syndrome. The subjects of this study were consisted of eight elementary school students with Down syndrome who participated in the strength training. The strength training was administered by six items such as squat, leg curl, leg extension, toe raise, sit-ups, and hyperextension. For strengthening muscle, each group also was treated by walking for 8 weeks, three times a week, 10-15RM, 3sets, which was based on the principle of progressive overload. For inquiring the effect of strength training, the ground reaction force variables were measured in two phases : before-training and 8 week-after training. The gait of each subject was acquisition using 2 AMTI force platforms set at 100 frequency. The results of this study were as follows: The pattern of vertical, antero-posterior and modio-lateral forces, trajectory of net COP and the timing ratio of reaching the each events were shown variously. So, it is not easy to explain these variables clearly. As the result of strength training, these variables were changed. However, the results of within subjects differ greatly, there was no difference statistically.

축구 페널티 킥의 운동학적 분석

임비오 한국운동역학회 2001 한국운동역학회지 Vol.11 No.3

The purpose of this study was to establish and compare kinematic data among four groups of collegiate soccer players who kicked the inside left kick, inside right kick, instep left kick and instep right kick. Twenty-four kinematic parameters were measured for 8 collegiate soccer players. Approximately 62.5% of these parameters showed significant differences among the four kick variations. Among the kinematic variables that showed the significance in statistics were the angle of running, the angle of final support foot, the angle of pelvis tilting, and so on. In angle of running, instep kick was the great more than inside kick. Also, right direction of kick was the great more than left direction of kick. In left direction of inside kick and instep kick, the final support foot were located left side. At ball impact the right direction of inside kick had the greatest pelvis tilting angle. Understanding kinematic differences can help a soccer kicker select and learn different kick drills and can help a goalkeeper learn how to predict the kick direction.

휠체어 디자인 특성에 따른 효율의 차이 규명

임비오,문영진,은선덕 한국운동역학회 2003 한국운동역학회지 Vol.13 No.1

Lim, B-O · Moon, Y-J and Eun, S-D. Analysis on the differences of mechanical efficiency from design characteristics of wheelchair. Korean Journal of Sport Biomechanics Vol. 13, No. 1,pp. 109-119.'2003 Korean Society of Sport Biomechanics proceedings. The purpose of this study was to investigate differences of the mechanical efficiency of the characteristics of the basketball wheelchairs(cambers & size of the handrims). Nine mechanical efficiency on the characteristics of the basketball wheelchairs(cambers 7 size of the handrims). Nine healthy and normal wheelchair basketball players who had no impairments to their upper extremities were volunteered to participate in this study. VO_2 was collected using automatic gas analyzer(vmax29). Gross efficiency, net efficiency and work efficiency were analyzed from the calculated external power output and energy expenditure. The results were followed. First, gross efficiency in the basketball wheelchairs was observed across the range form 4 to 10%. Gross efficiency in this study showed less values than that from the literature reviewed in the arm cranking(15%), racing wheelchair(above 30%), gait(27%) and cycling(18-23%). Second, the small size of handrim(61cm) at the 16 degrees of camber produced higher efficiency values than the large size of handrim(66cm) whereas the different sizes of handrim at the 20 degrees of camber did not show any pattern. Third, both faster speed(1.11㎧→1.39㎧) and increase in treadmill inclination produced increases in energy expenditure. The results of this study may provide not only better understanding of the mechanical efficiency with adequate camber degree and proper size of handrim but also fundamental information for manufacturing the wheelchair.

전후면과 좌우면상에서의 골프 퍼팅 동작이 정확성에 미치는 영향

신인식,은석덕,임비오,정철수 師範大學 體育硏究所 1999 서울大學校 體育硏究所論集 Vol.20 No.2

The purpose of this study was to compare two putting styles in direction and distance by analyzing the results of the statistical analysis. One style was a performed by conventional putter, the other style was performed by a newly manufactured putter. A conventional putter was performed in frontal plane and A newly manufactured putter was performed in sagital plane. Six expert and sixteen novice subjects executed thirty times per putter and distance as accurately as possible, in order to reach a target distance of 4 and 7 m. The distance at which the balls stopped away from the cup was measured and analyzed statistically. According to statistical analysis, in distance, the style which performed in sagital planes was better than the style which performed in frontal planes in novice and expert. Therefore, the traditional method of putting may not be the best technique for golfers; other methods such as using a newly performed styles may be more effective.

Kinematic Analysis of Penalty Kick in Soccer

( Bee Oh Lim ) 한국운동역학회 2005 한국운동역학회 논문 영문초록집 Vol.2005 No.-

Effects of Sports Injury Prevention Training on the Biomechanical Risk Factors of Anterior Cruciate Ligament Injury in High School Female Basketball Players

Lim, Bee-Oh,Yong Seuk Lee,,Jin Goo Kim,,Keun Ok An,,Jin Yoo,,Young Hoo Kwon, SAGE Publications 2009 AMERICAN JOURNAL OF SPORTS MEDICINE - Vol.37 No.9

<P><B>Background:</B> Female athletes have a higher risk of anterior cruciate ligament injury than their male counterparts who play at similar levels in sports involving pivoting and landing.</P> <P><B>Hypothesis:</B> The competitive female basketball players who participated in a sports injury prevention training program would show better muscle strength and flexibility and improved biomechanical properties associated with anterior cruciate ligament injury than during the pretraining period and than posttraining parameters in a control group.</P> <P><B>Study Design:</B> Controlled laboratory study.</P> <P><B>Methods:</B> A total of 22 high school female basketball players were recruited and randomly divided into 2 groups (the experimental group and the control group, 11 participants each). The experimental group was instructed in the 6 parts of the sports injury prevention training program and performed it during the first 20 minutes of team practice for the next 8 weeks, while the control group performed their regular training program. Both groups were tested with a rebound-jump task before and after the 8-week period. A total of 21 reflective markers were placed in preassigned positions. In this controlled laboratory study, a 2-way analysis of variance (2 × 2) experimental design was used for the statistical analysis (<I>P</I> < .05) using the experimental group and a testing session as within and between factors, respectively. Post hoc tests with Sidak correction were used when significant factor effects and/or interactions were observed.</P> <P><B>Results:</B> A comparison of the experimental group’s pretraining and posttraining results identified training effects on all strength parameters (<I>P</I> = .004 to .043) and on knee flexion, which reflects increased flexibility (<I>P</I> = .022). The experimental group showed higher knee flexion angles (<I>P</I> = .024), greater interknee distances (<I>P</I> = .004), lower hamstring-quadriceps ratios (<I> P</I> = .023), and lower maximum knee extension torques (<I>P</I> = .043) after training. In the control group, no statistical differences were observed between pretraining and posttraining findings (<I>P</I> = .084 to .873). At pretraining, no significant differences were observed between the 2 groups for any parameter (<I>P</I> = .067 to .784). However, a comparison of the 2 groups after training revealed that the experimental group had significantly higher knee flexion angles (<I>P</I> = .023), greater knee distances (<I> P</I> = .005), lower hamstring-quadriceps ratios (<I>P</I> = .021), lower maximum knee extension torques (<I>P</I> = .124), and higher maximum knee abduction torques (<I>P</I> = .043) than the control group.</P> <P><B>Conclusion:</B> The sports injury prevention training program improved the strength and flexibility of the competitive female basketball players tested and biomechanical properties associated with anterior cruciate ligament injury as compared with pretraining parameters and with posttraining parameters in the control group.</P> <P><B>Clinical Relevance:</B> This injury prevention program could potentially modify the flexibility, strength, and biomechanical properties associated with ACL injury and lower the athlete’s risk for injury.</P>

Effect of Aquatic Exercise Therapy on Gait for People with Knee Osteoarthritis: Systematic Review with Meta-Analysis

( Bee Oh Lim ) 한국체육학회 2015 국제스포츠과학 학술대회 Vol.2015 No.1

Purpose: Aquatic exercise therapy is frequently described to maintain function for people with knee arthritis. The relative efficacy of gait characteristics for this population has not been established. The purpose of this study was to examine the effect of aquatic exercise therapy on gait of individuals with knee osteoarthritis. Method: Randomised clinical trials (RCTs) were identified by searching through PubMed, CINAHL, SportDiscus, and Research Information Sharing Service(RISS). All literature published to March 2015 were included in the search. Data were collected from RCTs that compared the effects of exercise therapy on walking ability with the effects of no intervention or psychoeducational intervention in participants with knee osteoarthritis. The outcome data on the total distance walked (6-minute walk test); the amount of time spent walking (the time to walk arbitrary distances); and gait velocity were obtained and analysed. Standardized mean differences (SMDs) and 95% confidence intervals (CIs) were calculated. Result: Twenty-two RCTs were identified. Meta-analysis provided very-low-quality evidence that exercise therapy increased the total distance walked in the 6-minute walk test, in comparison with the effects of the control interventions (SMD = 0.47, 95% CI 0.25 to 0.59). Meta-analysis also provided low- or moderate-quality evidence that the amount of time spent walking and gait velocity were improved more by exercise therapy than by the control interventions (the amount of time spent walking: SMD = -0.49, 95% CI -0.69 to -0.29; gait velocity: SMD = 1.69, 95% CI 0.97 to 2.61). Conclusion: In individuals with knee osteoarthritis, aquatic exercise therapy can improve the amount of time spent walking, gait velocity, and maybe the total distance walked.

Sex differences in knee neuromuscular factors during basketball rebound jump

( Lim Bee-oh ) 대한운동사협회 2007 대한운동사협회 운동사대회자료집 Vol.2007 No.-

Statistical Analysis of Soccer Game

Lim, Bee-Oh,Chung, Chul-Soo,Shin, In-Sik,Yoon, Jae-Man Korean Society of Sport Biomechanics 2003 한국운동역학회지 Vol.13 No.3

본 연구의 목적은 2002년 한 일 월드컵에서 우승을 차지한 브라질의 7경기를 대상으로 축구 경기를 분석하는 것이다. 본 연구에 사용된 경기 분석용 비디오테이프는 FIFA에서 인정한 공식 중계방송사인 한국방송공사(KBS)의 중계 자료를 사용하였다. 본 연구의 통계 처리는 SPSS프로그램을 이용하여 상관관계분석(Pearson Correlation)을 실시하였다. 본 연구를 통한 결론은 다음과 같다. 첫째, 브라질 팀은 득점할 수 있는 비율이 높은 수비에서 최종공격수로 바로 연결되는 역습에 의한 공격(20.0%), 미더필드를 통한 빠른 공격(20.0%), 세트 플레이에 의한 공격(15.5%), 공격지역에서 볼을 뺏은 후 공격(18.5%)으로 다양한 공격 전술을 구사하여 상대 팀보다 많은 득점기회를 얻었다. 둘째, 브라질 팀은 골키퍼를 제외한 전 선수의 볼 소유 횟수가 비슷하게 나타나서, 전 선수가 고르게 활약했다. 경기의 질을 나타내는 지수인 인덱스에서는 수비수 중에는 중앙 수비수가 3.3, 미드필더 중에는 왼쪽 중앙 미드필더가 5.0, 공격수 중에는 중앙 공격수가 1.4로 포지션별로 제일 높게 나타나서 경기에서 중요한 역할을 수행하였다. 셋째, 브라질 팀은 세트플레이 성공률과 공격지역에서의 볼 점유율의 증가를 통하여 골당공격성공률을 높인 것으로 나타났다.

Biomechanical comparison of rotational activities between anterior cruciate ligament- and posterior cruciate ligament-reconstructed patients.

Lim, Bee Oh,Shin, Han Sol,Lee, Yong Seuk Springer International 2015 KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY Vol.23 No.4

<P>The purpose of this study was to compare the early functional recovery using biomechanical properties between anterior cruciate ligament (ACL)- and posterior cruciate ligament (PCL)-reconstructed patients and to determine the biomechanical deficit of PCL-reconstructed patients compared to ACL-reconstructed patients.</P>