• Journal of the Korean Applied Science and Technology
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• v.40 no.4
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• pp.606-615
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• 2023

The purpose of this study was to investigate the effect of increasing weight load on the dynamic balance on Y-balance Test(YBT). 18 male and female adults in their 20-30s (age: 23.17±1.72 years, height: 172.46±9.84 cm, weight: 73.39±11.44 kg, leg length: 88.89±5.69 cm) participated in the experiment. To measure the dynamic balance, the YBT was used to measure the reach distance, composite score, and COP variables to derive the results. As a result of the study, dynamic balance was improved in weight load in posteromedial and posterolateral reach and overall score during YBT. As a result of COP, anteroposterior amplitude, left and right COP velocity, and COP area during anterior reach improved dynamic balance in weight load in the right foot, but there was no difference during the posteromedial reach, ML amplitude in the left foot, AP COP velocity in left foot, ML COP velocity and COP velocity in both foot, and COP area in both foot improved dynamic balance when weight load during posterolateral reach.

• Journal of Oral Medicine and Pain
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• v.18 no.2
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• pp.107-119
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• 1993

저자는 다양한 저작방법에 따른 전측두근과 교근의 좌우균형성을 규명하기 위하여 정상 성인 27명을 대상으로 습관성 저작시, 양측 규칙 저작시, 우측 규칙 저작시 및 좌측 규칙 저작시에 근활성도와 근전도 power spectrum을 컴퓨터를 이용한 근전도 시스템을 이용하여 분석한 결과 다음과 같은 결론을 얻었다. 1. 습관성 저작시 우측 전측두근 및 교근 모두 좌측에 비하여 높은 근활성도를 보였다. (p<0.05). 2. 양측 규칙 저작시 우측 교근은 좌측에 비하여 높은 근활성도를 보였으나 (p<0.05), 전측두근에서는 좌우측 근활성도의 유의한 차이가 없었다. 3. 우측 규칙 저작시 우측 전측두근 및 교근 모두 좌측에 비하여 높은 근활성도를 보였다. (p<0.05) 4. 좌측 규칙 저작시 좌측 교근은 우측에 비하여 높은 근활성도를 보였으나 (p<0.05), 전측두근에서는 좌우측 근활성도의 유의한 차이가 없었다. 5. 저작시 전측두근고 교근의 중간주파수 경사도는 좌우측에서 유의한 차이가 없었다.

• Proceedings of the Korea Contents Association Conference
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• 2012.05a
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• pp.97-98
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• 2012

본 연구의 목적은 치료면의 질에 따른 복합균형운동프로그램이 균형능력에 어떠한 영향을 미치는지 알아보기 위해 본 연구를 실시하였다. 정상 성인 21명을 대상으로 연구를 진행하였으며 복합균형 운동을 실시한 Aero-step군(ASG)과 평지면군(Flat floor group;FFG) 그리고 처치 없이 실시한 대조군에게 Biodex balance system을 이용하여 전체안정성지수(Overall stability index;OSI), 전후안정성지수(Anteroposterior index;APSI), 좌우안정성지수(Mediolateral stability index;MLSI)를 측정하였다. 본 연구 결과에서 전체안정성지수와 전후안정성지수는 Aero-step군의 그룹 내 비교에서 유의한 차이가 있었으며 좌우안정성지수는 평지면군의 그룹 내 비교에서 유의한 차이가 있었다. 전후안정성지수의 그룹간 비교에서 유의한 차이가 있었다. 본 연구의 결과에 따라 치료면의 질에 따른 복합균형운동이 안정된 지지면 보다는 불안정한 지지면의 균형능력 향상에 더 효과적이라 사료된다.

• The Journal of the Korea Contents Association
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• v.14 no.9
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• pp.120-130
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• 2014

The purpose of this study was to evaluate the effects of line dance activity on the balance factors during static standing to reveal the exercise intervention for fall prevention. A 15-week line dance programme was applied to 16 elderly females who aged more than 65 years in the community. Balance ability during static standing was evaluated by the range of center of pressure(cop), the velocity of cop, and sway area that calculated on the basis of ground reaction force data, forces, and moments. The range and velocity of cop in the anterio-posterior were significantly reduced after line dance(p<.01, p<.05, respectively), but change in those of cop in the medio-lateral was not found. It was demonstrated that 16-week line dance activities allow more effective in anterio-posterior stability and sway area of static standing. It was suggested that the effect of fall prevention exercise should be studied more associate with fall from vestibular and sensory system as future study.

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.381-382
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• 2013

본 연구의 목적은 젊은 성인과 노인의 장애물 보행 시 신체질량중심의 변위와 최대속도를 3차원적으로 비교 분석하여 노인의 낙상위험 및 균형능력을 평가할 수 있는 중요한 요소가 될 수 있는지를 검증하는데 있다. 본 연구의 대상은 건강한 젊은 성인 10명(남성 6명/여성 4명, $24.6{\pm}1.9$세)과 65세 이상 건강한 노인 10명(남성 1명/여성 9명)으로 선정하였다. 각 피험자 신장의 10% 높이의 장애물 보행을 실시하였으며 동작 분석 장비를 통해 신체질량중심의 변위와 최대속도를 3차원적으로 분석하였다. 전후방향에서는 젊은 성인 집단의 변위가 더 크고(p=.019) 최대속도가 더 빠르게 나타났으며(p<.001), 좌우방향에서는 노인 집단의 변위가 더 크고(p=.004), 더 빠르게 나타났다(p<.001). 수직방향에서의 변위는 유의한 차이가 없었고(p=.135), 최대 속도는 젊은 성인 집단이 더 빠르게 나타났다(p<.001). 신체질량중심의 좌우방향에서의 크고 빠른 움직임은 노인의 동적 균형능력 저하로 인해 넘어가는 발(swing limb)의 안정적인 지지면 딛기를 위한 보상적 조절로 여겨지며, 따라서 노인의 낙상위험 및 균형능력을 평가할 수 있는 중요한 요소가 될 수 있을 것으로 사료된다.

• Journal of Oral Medicine and Pain
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• v.17 no.1
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• pp.73-87
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• 1992

저자는 28명의 측두하악장애 환자와 31명의 정상인을 대상으로 최적기능교합의 개념에 입각하여 교합시의 치아접촉점을 동적이며 정량적인 방법으로 평가하여 교합안정장치의 사용으로 인한 교합안정성의 개선여부를 알아보고자 하였다. 이와 동시에 교근과 전측두근의 활성도를 측정하여 치료의 경과에 따른 근활성의 변화를 알아보기 위해 본 연구를 시행하였다. 측정항목은 개구범위, 두개하악장애지수, 치아접촉점 좌우균형치, 치아접촉점 전후균형치, 치아접촉점 평균시간간격, 치아접촉점의 개수, 접촉시간, 좌우측 교근과 좌우측 전측두근의 근활성, 근활성 비대칭 지수 등이었다. 이의 측정을 위해 T-Scan System, K-6 Diagnostic System 그리고 EM 2등을 사용하였으며 얻어진 자료에 대해 검정한 후 다음과 같은 결론을 얻었다. 1. 교합안정장치를 이용하여 측두하악장애 환자들을 4주간 치료한 결과 전반적인 임상증상이 호전되어 개구범위와 두개하악장애지수에 있어서 뚜렷한 개선이 있었다. 2. 측두하악장애 환자에서 최대 악물기시의 치아접촉점 좌우균형치및 평균시간 간격이 큰 것으로 나타나 치아접촉이 일어나는 순간의 교합안정성이 좋지 않은 것으로 평가되었다. 3. 치료 4주후 교하안정장치를 장착한 상태에서 측정한 치아접촉점 좌우균형치및 치아접촉점 평균시간간격은 치료전에 비해 개선된 것으로 나타났다. 4. 치료 4주후 치아접촉점의 전후방 분포가 구치부위로 이동되는 양상을 보였다. 5. 측두하악장애 환자에서 최대 악물기시의 좌우측 교근 및 전측두슨의 근활성은 정상인에 비해 낮에 나타났으며, 이는 치료기간 동안 감소되는 경향을 나타내었다. 6. 측두하악장애 환자에서 전측두근의 근활성 비대칭지수는 정상인에 비해 상당히 높게 나타났으며 이는 치료기간 동안 감소되는 경향을 나타내었다.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.11 no.3
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• pp.271-277
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• 2017

The purpose of this study was to develop a balance chair for improving pelvic correction and postural balance through postural balance training using tactile feedback by a vibration motor provided in real time according to the user's attitude. We built a body frame using mono cast(MC) Nylon, Touch thin film transistor(TFT) for user interface, a main control module using Arduino, a 9-axis acceleration sensor for user's posture determination, and a vibration module for tactile feedback. The prototype of the Balance Chair which surrounds the outside was made with cushion for sitting conformability. In order to verify the effectiveness of the postural balance training system using the built prototype, the muscle activity (% MVIC) of the left and right iliocostalis lumborum those are the main muscles of the spinal movement was measured with ten female subjects. And the balance ability before and after training was measured using Spine Balance 3D, a posture balance ability evaluation device. The muscular activities of the left and right iliocostalis lumborum showed the balance activation according to vibration feedback during exercise protocol and postural balance improved after balance exercise training using balance chair. This study could be apply to use the fundamental research for developing the various postural balance product.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.37-44
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• 2016

The aim of the present study was to compare the strength, balance, and flexibility across two age groups (older adults vs. young adults). The isokinetic muscle function, ankle ROM, trunk forward flexibility, stability, and antropometric data for the elderly and 46 university students were collected. The results indicated that male older adults possessed relatively low flexibility (2.97cm) among the groups and showed better stability in the right foot than in the left foot and $35^{\circ}$ of plantar flexion ROM, which was not in the normal range. Their peak strength at the knee joint was below 50% of their counterpart. They revealed a hamstring deficit of 18.55%, ankle eversion deficit of 23.08%, and ankle inversion deficit of 19.19%. The results indicated that female older adults possessed comparable flexibility compared to female young adults. The reciprocal muscle strength ratio of both knees was under 50%, and the deficit was 14.32% (extension) and 19.73% (flexion). The ankle plantar flexion peak torque was approximately 62% (left) and 73% (right) of WS's. The ankle dorsi flexion deficit was 25.05% and the plantar flexion was 26.86%. The eversion deficit was 19.97% and the inversion was 21.09%. These results will be significant in establishing an elderly fitness enhancement program and policy.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.7
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• pp.3074-3084
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• 2012

The purpose of this study lies in examining how sling lumbar stabilization exercise affects static standing balance of adolescent idiopathic scoliosis patients. The subjects were forty patients who were diagnosed with idiopathic scoliosis. They were randomly assigned either to a experimental group (n=20) that received sling lmubar stabilization exercise program or to a control group (n=20) that received only education. Data were obtained for each patient from total sway path and sway velocity in standing on both feet with eyes closed and standing on both feet with eyes open were measured, using balance performance monitor. All variables were measured at pre- and post-exercise. There were significantly differences between the both groups for all variables at post-exercise (p<.05). The experimental group showed a significantly decreases in all variables at pre- and post-exercise (p<.05). But the control group showed a no significantly differences. These results revealed that sling lumbar stabilization exercise improved static standing balance, by reducing COP(center of pressure) sway path and sway velocity of idiopathic scoliosis patients, and it is expected that sling lumbar stabilization exercise will be used as balance enhancement exercise intervention for the treatment of adolescent idiopathic scoliosis patients.

• Journal of the Korean Applied Science and Technology
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• v.40 no.5
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• pp.977-987
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• 2023

The purpose of this study was to investigate the effect of visual information on the dynamic balance on Y-balance Test(YBT). The subjects of the study were 18 male and female adults in their 20s and 30s (age: 23.17±1.72 years, height: 172.46±9.84 cm, weight: 73.39±11.44 kg, leg length: 88.89±5.69 cm) who participated in the study. To measure dynamic balance between binocular and monocular use, absolute reach distance, composite score, and COP variables were measured on left and right feet through YBT and results were derived. As a result of the study, monocular block(left and right eye block) showed higher absolute reach and composite scores than binocular use in posterolateral, posteromedial, and composite scores during YBT. As a result of COP, there was no difference in anterior and posteromedial reach. When reaching posterolateral, AP COP velocity of left foot in monocular block appeared slower than that in binocular vision, and in COP velocity, COP velocity of left foot in monocular block appeared slower than binocular vision.