• 한국운동역학회지
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• 제17권2호
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• pp.207-216
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• 2007

The purpose of this study was to biomechanical analysis Judo's Kuzushi throwing motion in order to increase the effectiveness of Nage-waja(throwing technique). The Tori was a Judo player with 18 years experience(4th degree) while the Uke was a player with 2 years experience(1st degree). The kinematic data was captured using the Vicon motion system (7 cameras) and the kinetics were recorded by force plates(2 AMTI). The following were the results; While leaning to the front the subject's trunk's angle was $14.5^{\circ}$, the lower limbs angle was $23.8^{\circ}$, knee angle was $179.6^{\circ}$ and the vertical reaction of the left leg was 325.42N(BW 0.34) and the right leg was 233.7N(BW 0.47). While leaning back the subject's trunk's angle was $11.3^{\circ}$, the lower limbs angle was $4.1^{\circ}$, knee angle was $1761^{\circ}$ and the vertical reaction of the left leg was 299.53N(BW 0.43) and the right leg was 441.7N(BW 0.64). While leaning to the left the subject's trunk's angle was $30.8^{\circ}$, the lower limbs angle was $2.7^{\circ}$, knee angle was $175.2^{\circ}$ and the vertical reaction of the left leg was 711N(BW 1.03) and the right leg was 9.2N(BW 0.01). While leaning to the right the subject's trunk's angle was $36.5^{\circ}$, the lower limbs angle was $10.4^{\circ}$, knee angle was $175.2^{\circ}$ and the vertical reaction of the left leg was 13.2N(BW 0.02) and the right leg was 694.7N(BW 1.01). While leaning to the left front corner the subject's trunk's angle was $19.8^{\circ}$ (front) and $15.1^{\circ}$ (left), the lower limbs angle was $17.8^{\circ}$ (front) and $2.4^{\circ}$ (left), knee angle was $177.8^{\circ}$ (front) and $173.9^{\circ}$(left), and the vertical reaction of the left leg was 547.4N(BW 0.8) and the right leg was 117.8N(BW 0.17). While leaning to the right front corner the subject's trunk's angle was $15.4^{\circ}$ (front) and $17.7^{\circ}$ (right), the lower limbs angle was $21.1^{\circ}$, (front) and $5.7^{\circ}$ (right), knee angle was $175.5^{\circ}$ (front) and $178.9^{\circ}$(right), and the vertical reaction of the left leg was 53N(BW 0.08) and the right leg was 622.4N(BW 09). While leaning to the left rear corner the subject's trunk's angle was $9.2^{\circ}$ (back) and $13.8^{\circ}$ (left), the lower limbs angle was $2^{\circ}$, (back) and $5.7^{\circ}$ (left), knee angle was $175.5^{\circ}$ (back) and $172.8^{\circ}$(left), and the vertical reaction of the left leg was 698.2N(BW 1.02) and the right leg was 49.6N(BW 0.07). While leaning to the right rear corner the subject's trunk's angle was $8.9^{\circ}$ (back) and $19.6^{\circ}$ (right), the lower limbs angle was ${0.6^{\circ}}_"$ (back) and $3.1^{\circ}$ (right), knee angle was $174.6^{\circ}$ (back) and $175.6^{\circ}$(right), and the vertical reaction of the left leg was 7.2N(BW 0.01) and the right leg was 749.4N(BW 1.09). It was observed that during the Judo motion Kuzushii the range of the COM varied from $26.5{\sim}39.9cm$. It was concluded that the upper body leaned further than the lower body as there was knee extension. There was high left leg reaction forces while leaning to the left and likewise for the right side. It was therefore deduced that the Kuzushi was a more effective throwing technique for the left side.

• Transactions on Electrical and Electronic Materials
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• 제15권3호
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• pp.144-148
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• 2014

The purpose of this research is to utilizing the Tetrax$^{(R)}$ balance measuring instrument in order to analyze the postural balance of males and females in their 30 s diagnosed with chronic lower back pain who have followed a 12-week rehabilitation exercise program. The research also examines the effects on any change in back pain level. In terms of the variables in this research, postural balance (left/right, front/back, postural balance) and pain level change (0~100 mm) were measured. Pre-/post-experimental differences were assessed using the paired-t test. In addition, to identify any gender gap, we set the preliminary scores as a covariate and ran the Analysis of Covariance. Statistical significance (a) herein was set at 0.05. As a result of this research experiment, the left/right, front/back, and overall postural balance were found to increase in both the male and female cases, but with no statistical significance or gender gap. However, both males and females showed a significant decrease in their back pain levels. These findings demonstrate the necessity of continuing clinical research based on the Tetrax$^{(R)}$ equipment for scientific evaluation of the effects of rehabilitation exercises on chronic lower back pain patients and their balancing ability.

• 대한물리의학회지
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• 제16권2호
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• pp.71-79
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• 2021

PURPOSE: Chronic low back pain is one of the main factors that affect the quality of life and cause problems of gait and balance in elderly people. This study investigated the correlation between the Oswestry disability index (ODI), Berg balance scale (BBS), and kinematic data measured while analyzing the gait of elderly people with chronic back pain. METHODS: A total of 29 subjects participated in this study. The ODI, BBS, and kinematic data of lower extremities were measured while walking. All data were analyzed using Pearson's correlation coefficients and the significance was measured at .05. RESULTS: ODI had a significant correlation with 1, 13, and 14 items of BBS (p < .05), and left hip external rotation and right ankle abduction respectively in the stance and swing phase of gait (p < .01). 13 items of BBS had a significant correlation with the right ankle abduction in the stance phase of gait (p < .01). In addition, 14 items of BBS had a significant correlation with right and left ankle abduction in the stance and swing phase of gait (p < .01). CONCLUSION: While attempting to predict chronic low back pain and balance issues, it may be useful to check the right ankle abduction in the stance and swing phase of gait. In the future, it would be helpful if some simple tests could be designed to assess balance in elderly people with chronic low back pain.

• 재활복지공학회논문지
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• 제11권2호
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• pp.115-124
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• 2017

본 연구에서는 하지의 좌우 불균형 검출을 위한 밸런스 측정 인솔을 개발하고 불균형을 개선하기 위한 청각 피드백 기술에 대한 검증을 하고자 하였다. 밸런스 인솔은 실시간 압력 감지 범위가 64 단계이며 발바닥 압력분포를 고려해 8개 부위에 FSR 센서를 탑재한 FPCB로 구성되었다. 피험자는 하지의 좌우 근력차이가 20% 이상 차이가 나는 피험자 20명을 선출하였다. 피험자들은 경사 0, 5, 10%와 속도 3, 4, 5km/h 로 15분 간 트레드밀 위에서 보행을 하였다. 또한 보행 시 나타나는 좌우 불균형을 평가 및 청각 피드백에 따른 개선효과를 검증하기 위해 측정된 족압 센서 데이터와 실시간 근육생리신호 데이터를 비교분석하였다. 실험 결과, 보행경사와 속도가 증가할수록 하지 좌우의 근력 불균형을 보유한 피험자들은 75.7%~140.9%까지 증가하는 반면 청각 피드백을 제공 시 10% 이내로 감소하는 결과를 보였다. 본 연구에서 개발 인솔 시스템을 이용한 보행환경에 따른 인체 좌우 불균형 발생시 FSR 신호 감도 결과와 인체생리신호 간 유효한 결과를 보였다. 향후 밸런스 피드백 보행 시 하지 좌우 불균형 개선 효과 경향을 보여 향후 족부 영역별 FSR 센서 민감도, 불균형 검출 및 개선을 위한 역치점 처리 알고리즘 개발에 대한 연구가 필요하다고 사료된다.

• 국제물리치료학회지
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• 제8권2호
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• pp.1163-1167
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• 2017

The purpose of this study was to compare the effects of Kinesio taping in each area of the ankle versus the knee to improve balance abilities and proprioception sense. The healthy twenty eight students were divided into two groups, Group A and B. Ankle taping was applied to Group A, and knee taping was applied to Group B. In the ankle taping group, significant increase of dynamic balance abilities was appeared in the forward, left ward and right ward (p<.05). In the knee taping group, there was significant increase of dynamic balance abilities in the forward and left ward (p<.05). There was no significant increase of static balance abilities in both groups. In both groups of ankle and knee taping, there was significant increase of proprioception sense. These findings suggest that ankle and knee taping was helpful for improving dynamic balance abilities and proprioception sense.

• 대한통합의학회지
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• 제12권2호
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• pp.11-23
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• 2024

Purpose : The purpose of this study was to investigate the effect of exercise using a suspension device (sling and total body resistance exercise; TRX) on physical functional performance and postural balance. Methods : An experimental study comparing 2 different suspension exercise was conducted on 16 healthy college students. 16 subjects were assigned to two groups. They were classified into 8 sling group and 8 TRX group. Miniplus was used to evaluate physical functional performance. In this study, isokinetic resistance mode was used to compare and analyze seven movement patterns. Biorescue was used to evaluate postural balance. The intervention exercises in this study are as follows. Standing lean forward (SLF) using a sling and TRX was performed 3 times a week for 3 weeks. The SLF was held for 10 seconds and then rested for 15 seconds, repeated a total of 10 times for 3 sets. Results : In the TRX group, significant increases were observed in physical functional performance (p<.05). Among the differences between groups, significant differences were confirmed on the front of the right arm, the back of the left arm, and the back of the right arm. In the sling group, significant increases were observed in left, right, front, and overall dynamic balance (p<.05). A significant increase in posterior dynamic balance was confirmed in the TRX group (p<.05). There was no significant difference between groups. Conclusion : Based on the results of this study, TRX was effective in improving physical functional performance, while the sling was effective in enhancing postural balance. However, confirming the effectiveness of slings and TRX in the relationship between physical functional performance and postural balance proved inadequate. Therefore, additional research should be conducted to verify the effects of suspension.

• 대한물리의학회지
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• 제1권1호
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• pp.77-92
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• 2006

Purpose : This study was to evaluate the effect of traditional balance training on balance in older adults. Methods : The subjects of this study were thirty elderly over 65 years old. Thirty subjects ranging aged from 66 to 85($74.0{\pm}5.83$) completed the study and participated three times a week for 5weeks. Subjects were assessed by utilizing two different balance measure : Static standing balance was measured by balance performance monitor(BPM). Dynamic balance was measured by timed up and go test(TUG). The scale for static standing balance was measured by using frequence(Hz), sway area($mm^2$), sway path(mm), max sway velocity(mm/s), ant/post sway angle($^{\circ}$), left/right sway angle($^{\circ}$), and sway number. Results : The change in frequency were statistically significant on pre-test and post-test(P<.05), 2. The change in sway area were statistically significant on pre-test and post-test (P<.05), 3. The change in sway path were statistically significant on pre-test and post-test(P<.05), 4. The change in max sway velocity were statistically significant on pre-test and post-test (P<.05), 5. The change in ant/post sway angle were statistically significant on pre-test and post-test (P<.05), 6. The change in left/right sway angle were statistically significant on pre-test and post-test(P<.05), 7. The change in sway number were statistically significant on pre-test and post-test(P<.05), 8. The score on timed up and go test shows statistically significant increase on pre-test and post-test (P<.05). Conclusion : This study suggest that traditional balance training have an effect on balance performance ability for elderly people. Therefore, the traditional balance training is recommended for older adults to improve balance performance ability.

• 한국산학기술학회논문지
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• 제18권12호
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• pp.597-604
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• 2017

본 연구의 목적은 만성 뇌졸중 환자를 대상으로 전정자극훈련 프로그램이 정적 균형 및 동적 균형에 미치는 영향을 알아보는 것이다. 본 연구는 2014년 7월 15일부터 9월 6일까지 진행하였으며, 대상자는 뇌졸중 진단을 받은 환자 20명이 본 연구에 참여하였고, 무작위로 Group I(일반운동치료, n=10)과 Group II(전정자극훈련, n=10)로 나누었다. 두 군 모두 주 3회, 회당 40분씩 6주간 치료적 중재를 실시하였다. 균형 능력은 Good Balance System을 이용하여 정적 균형 및 동적 균형을 측정하였으며, 중재 전과 후를 비교하였다. 연구 결과, 전정자극 훈련군에서는 눈감고 선자세의 좌우 및 전후 균형, 눈뜨고 선자세의 좌우 및 전후 균형, 이동시간, 이동거리에서 통계학적으로 유의한 차이를 보였고, 일반운동 치료군에서는 눈뜨고 선자세의 좌우 균형을 제외한 모든 항목에서 통계학적으로 유의한 차이는 보이지 않았다. 결론적으로, 본 연구에서는 전정자극 훈련은 만성 뇌졸중 환자의 정적 균형 능력과 동적 균형 능력 향상에 긍정적인 영향을 미쳤으며, 이러한 뇌졸중 환자의 균형능력 향상을 위한 치료프로그램에 다양한 방법으로 활용될 수 있을 것이다.

• 한국산학기술학회논문지
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• 제16권9호
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• pp.5888-5896
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• 2015

본 연구의 목적은 요가와 필라테스 트레이닝이 비만 남자대학생의 비만도, 신체 부위별 근육량 및 체력에 미치는 영향을 분석하여 운동처방의 임상적 기초 자료를 제공하고자 하였다. 피험자는 비만 남자대학생 총 20명을 각각 10명씩 요가와 필라테스 두 집단으로 무선할당하여 12주간 주 5회 1회당 90분씩 트레이닝을 실시하였다. 그 결과 첫째, 요가와 필라테스는 모두 비만도(골격근량 증가, BMI 감소, 체지방률 감소, WHR 감소), 신체 부위별 근육량(오른팔, 왼팔, 몸통, 오른다리, 왼다리 근육량 증가), 체력(하지근력, 근지구력, 유연성, 좌측평형성, 우측평형성 향상)에 유의한 차이를 나타내었다. 둘째, 필라테스는 요가보다 골격근량 증가, 신체 부위별(오른팔, 왼팔, 몸통, 오른다리, 왼다리)근육량 증가, 평형성 (좌, 우) 향상에 유의한 차이를 나타내었다. 셋째, 요가는 필라테스 보다 BMI, 체지방률, WHR 감소에 유의한 차이를 나타내었다. 이러한 결과로 요가와 필라테스 트레이닝은 비만 남자대학생들의 비만도 개선과 건강증진에 유용한 운동프로그램으로 적용 가능하다고 사료되어진다.

• Journal of Sport and Applied Science
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• 제8권2호
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• pp.13-18
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• 2024

Purpose: The purpose of this study is to determine the effects of a 6-week weight training and complex training program on the Y-balance test (YBT) in high school soccer players. Research design, data, and methodology: This study included 26 high school soccer players from City S. Subjects were divided into a weight training group (WTG: n=13) and a complex training group (CTG: n=13) based on their willingness to participate without medical problems. The YBT measured anterior (AT), posteromedial (PM), posterolateral (PL), and composite scores (CS), and was measured twice: before the start and after the end of training. The data were analyzed using the SPSS 25.0 statistical program to compare pre- and post-training using paired-t tests, between training groups using independent-t tests, and left-right comparisons using independent-t tests. Results: Training resulted in a significant pre- to post-training change in PL in the left foot WTG group (p<.05), with no significant change in the other measures. There were no significant differences between training groups and between left and right sides. Conclusion: To improve YBT in high school soccer players, a program to improve ankle and hip mobility and strength should be added along with improving large muscle strength through weights and comflex training.