• PNF and Movement
• /
• 제12권3호
• /
• pp.133-142
• /
• 2014

Purpose: The purpose of this study was to investigate the effect of balance using ankle strategy during adjusted balance training and muscle training in normal young female adults. Methods: There were eighteen participants. All subjects were randomly assigned to three groups, the control group (n=6), the adjusted balance training group (n=6) and the muscle training group (n=6). Subjects were assessed for each subject by a pretest and a posttest at 1 week, 2 weeks, and 3 weeks, measuring the anterior-posterior limit of stability, trace length and EMG data for the tibialis anterior and lateral gastrocnemius. Results: The anterior-posterior limit of stability significantly increased in the training group (p<0.05). The trace length significantly decreased in the training group (p<0.05). The muscle activity of the tibialis anterior and lateral gastrocnemius also significantly decreased in the training group (p<0.05). Conclusion: We confirmed that both the balance training group and the muscle training group significantly increased the anterior-posterior limit of stability and decreased trace length and muscle activity. Further studies are needed to analyze the long-term effects on subjects resulting from these changes.

• 한국산학기술학회논문지
• /
• 제12권8호
• /
• pp.3555-3562
• /
• 2011

본 연구는 이중과제 훈련이 만성 뇌졸중 환자의 자세안정성과 균형능력에 미치는 효과를 알아보고자 하였다. 실험을 위해 모집 된 이동 가능한 25명의 편마비 환자를 무작위화 하여 이중과제 훈련군 13명과 대조군 12명으로 나누었다. 두 그룹 모두 6주간 주 5회 일 30분의 일반적인 물리치료를 시행하였으며, 추가적으로 이중과제 훈련군은 6주간 주3회 일 50분의 이중과제 훈련을 실시하였다. 훈련 전후 체간손상척도, 자세조절능력과 눈을 뜨고 감은 상태에서의 자세동요를 측정하였다. 연구 결과 이중과제 훈련군에서 자세안정성과 균형능력이 유의하게 향상되는 것을 확인할 수 있었다(p<0.05). 본 연구의 결과를 통하여 이중과제 훈련이 만성뇌졸중 환자에게 효과적인 운동방법이 될 수 있을 것이라 생각한다.

• 국제물리치료학회지
• /
• 제10권3호
• /
• pp.1823-1829
• /
• 2019

Background: Stroke patients have leg muscle weakness and impaired balance resulting in compensatory changes. To restore balance in these patients, functional training using postural strategy is needed. Objective: To examine the effects of ankle and hip strategy training on the center of pressure (COP) movement and limits of stability (LOS) in standing posture in stroke patients. Design: The study was an assessor-blinded and randomized-controlled clinical trial. Methods: Thirty patients were randomly assigned to an ankle strategy training group and a ankle/ hip strategy training group. Patients in the ankle strategy training group underwent ankle strategy exercise for 30 min, and those in the ankle/ hip strategy training group underwent 15 min of ankle strategy exercise and 15 min of hip strategy exercise. Both groups underwent training thrice a week for four weeks. Forward, backward, paretic side, and non-paretic side COP movements and LOS were measured using BioRescue. Results: After the intervention, except for the backward area in the ankle strategy training group, the COP movement area and the LOS were significantly improved in both the groups. In addition, these improvements were significantly higher in ankle/ hip strategy training group than that in the ankle strategy training group. Conclusions: Ankle strategy training in addition to hip strategy training improves COP movement (forward-backward, paretic side area, and non-paretic side area) and LOS in stroke patients.

• 국제물리치료학회지
• /
• 제6권2호
• /
• pp.884-890
• /
• 2015

This study observed the effects of ankle strengthening exercise and whole body vibration on the balance ability of older adults, thereby intending to provide basic materials for intervention methods aimed at improving older adults' balance ability. The subjects were 20 older adults who had experienced a fall. They were equally divided into two groups. Ankle strengthening training was applied to one group and ankle strengthening training and whole body vibration were applied to the other group, a timed up and go (TUG) test and Tinetti performance oriented mobility assessment (POMA) were performed, and changes in the subjects' limits of stability were observed. The TUG and POMA results significantly differed between before and after the experiment in the angle strengthening training (AST) group and the angle strengthening training with whole body vibration (ASTWV) group. In addition, the interaction between timing and each group was statistically significant. The limits of stability significantly changed after the intervention in both groups. Differences in the posterior and right limits of stability were significant between the AST group and ASTWV group. Therefore, ankle strengthening exercise and whole body vibration improve older adults' balance maintenance and reduce falls or the risk factors for falls in older adults.

• 대한간호학회지
• /
• 제30권5호
• /
• pp.1318-1332
• /
• 2000

The purpose of this study was to determine the effect of walk training on leg strength, flexibility, postural stability, balance and gait in home bound elderly women. Eighteen elderly women of the experimental group aged between 70 and 90 years image who have normal vision, hearing and Romberg test. They participated in the 12 week walk training. The subjects of the experimental group practiced walk training 3 times a week for during 12 weeks. During the 40 minute workout, the subjects practiced 5 minutes of warming-up exercises, 30 minutes of conditioning exercises and 10 minutes of a cool-down exercise. The intensity for the conditioning phase was determined by subject' heart rates, which ranged from 60% to 70% of age-adjusted maximum heart rates. The body composition, leg strength, flexibility, postural stability, balance and gait were measured prior to and after the experimental treatment. The body fat, lean body mass, leg strength (ankle dorsiflexor, plantarflexor, inversor and eversir, knee flexor, extensior), flexibility (range of motion of ankle dorsiflexion, plantarflexion, inversion and eversion), and postural stability of the experimental group were significantly greater than those of the control group. Duration of standing on the right foot and that of standing on the left foot of the experimental group was greater than that of the control group. Total balance scores of the experimental group were significantly higher than those of the control group. Among 13 items for balance, the scores of experimental group in balance with eyes closes, turning balance, sternal nudge, neck turning, one leg standing balance and back extension were higher than those of the control group. Total scores of gait of the experimental group were significantly higher than those of the control group following the walking training. Scores of experimental group in step height, step length and walk stance while walking among 9 items for gait were significantly higher than those of the control group. The results suggest that walk training can improve physical fitness for prevention in home bound elderly women.

• 한국콘텐츠학회논문지
• /
• 제13권10호
• /
• pp.9-18
• /
• 2013

본 연구에서는 게임 콘텐츠를 적용한 시각 피드백 훈련 프로그램을 이용하여 정상 여성 고령자와 정상 20대 성인의 자세균형 조절의 효과를 분석 하였다. 실험은 힘판 기반의 자세균형 훈련 장치를 이용하여 20대 성인 23명과 60대 고령자 14명은 주 3일, 하루에 15분씩 총 4주의 자세균형 훈련을 받았다. 자세균형 훈련에 대한 평가는 Balance SD(Biodex, medicalscience Inc., USA)의 자세 안정성과 자세 한계성을 분석하였으며, 훈련 전, 중, 후의 각 시점에 대한 유효성을 검증하였다. 실험 결과, 젊은 성인과 고령자 모두 훈련 전, 후에 자세안정성과 자세한계성에 유의한 효과가 있었음을 확인하였다(p<0.05). 이는 자세 균형게임은 자세 균형과 관련된 전 후 좌 우 다양한 방향에서의 무게 이동 능력을 향상시켰음을 알 수 있었다. 게임 기반 시각적 피드백 훈련은 자세균형에 효과적으로 적용가능하며 개인과 다양한 연령층에 맞는 맞춤형 콘텐츠 개발이 필요할 것으로 사료된다.

• Geomechanics and Engineering
• /
• 제25권1호
• /
• pp.17-30
• /
• 2021

This paper develops a convenient approach for deterministic and probabilistic evaluations of tunnel face stability using support vector machine classifiers. The proposed method is comprised of two major steps, i.e., construction of the training dataset and determination of instance-based classifiers. In step one, the orthogonal design is utilized to produce representative samples after the ranges and levels of the factors that influence tunnel face stability are specified. The training dataset is then labeled by two-dimensional strength reduction analyses embedded within OptumG2. For any unknown instance, the second step applies the training dataset for classification, which is achieved by an ad hoc Python program. The classification of unknown samples starts with selection of instance-based training samples using the k-nearest neighbors algorithm, followed by the construction of an instance-based SVM-KNN classifier. It eventually provides labels of the unknown instances, avoiding calculate its corresponding performance function. Probabilistic evaluations are performed by Monte Carlo simulation based on the SVM-KNN classifier. The ratio of the number of unstable samples to the total number of simulated samples is computed and is taken as the failure probability, which is validated and compared with the response surface method.

• 한국콘텐츠학회논문지
• /
• 제12권3호
• /
• pp.25-33
• /
• 2012

본 연구에서는 자세균형 훈련 효과를 향상시킬 수 있는 게임 콘텐츠를 적용한 시각 피드백 자세균형 훈련 프로그램을 이용하여 정상 20대 성인을 대상으로 자세균형 조절 능력의 향상에 관한 유효성을 검증하고자 한다. 힘판 기반 자세균형 훈련 장치를 이용하여 23명의 피험자들이 일주일에 3일, 하루에 15분씩 4주간의 자세균형 훈련을 받았다. 게임기반의 시각 피드백 자세균형 훈련에 대한 평가는 Balance SD(Biodex, medicalscience Inc., USA)의 자세 균형 평가를 통하여 자세안정성과 자세한계성을 분석하였으며, 실험자의 자세균형 능력의 증진을 통한 유효성을 검증하였다. 그 결과 자세안정성과 자세한계성 모두 훈련 전후로 유의한 차이가 있었음을 확인하였다(p<0.05). 이번 연구 결과는 게임기반의 시각 피드백 자세균형 훈련이 자세균형 능력 향상을 위한 운동에 적용될 수 있음을 의미하며, 향후 다양한 자세균형 훈련의 프로그램 종류, 강도 및 각 질환별 최적 콘텐츠 개발에 대한 정량적인 데이터 수집 및 분석연구가 필요하다.

• PNF and Movement
• /
• 제14권1호
• /
• pp.23-32
• /
• 2016

Purpose: The purpose of this study was to determine the effects of a coordinative locomotor training program on the functional movement screen (FMS) scores of badminton players. Methods: The participants consisted of 31 badminton players who were randomly assigned to either an experimental group (n=15) or a control group (n=16), and engaged in exercise five times per week for six weeks. The experimental group engaged in coordinative locomotor training and the control group engaged in general exercise. An FMS kit (USA) was used to measure the following: FMS score, deep squat, hurdle step, in-line lunge, shoulder mobility, active straight leg raise, trunk stability push up, and rotary stability. Results: The FMS score, deep squat, hurdle step, in-line lunge, active straight leg raise, and trunk stability push up showed significant improvement in the experimental group (p<0.05). Conclusion: The coordinative locomotor training program was able to produce confirmation that functional movement screen scores change in the case of effective exercise interventions in badminton players.

• 한국전문물리치료학회지
• /
• 제15권1호
• /
• pp.30-37
• /
• 2008

This study was designed to examine the effects of temporary immobilization of the ankle and knee joints on standing in healthy young adults with the use of a postural control mechanism. The subjects were twenty-four college students (12 males and 12 females, aged between 20 and 28). A Biodex balance system SD 950-302 and its software were used to measure indirect balance parameters in standing. Each subject underwent postural stability tests in 4-different joint conditions: free joints, ankle immobilization only, knee immobilization only, and ankle and knee immobilization. In addition, the postural stability test was conducted once with the subject's eyes open and once with the eyes closed conditions. For data analysis of the postural stability tests, the overall stability index, antero-posterior stability index, and medio-lateral stability index were recorded. The overall stability index (p=.000) and medial-lateral index (p=.003) were significantly greater different conditions with eyes closed in postural stability. Therefore, the eyes closed condition is expected to be used as an effective postural stability training for treatment planning in patients with unstable postures. In addition, training based on the dynamic multi-segment model can improve postural stability and is available to therapeutic programs, helping people with unstable balance to reduce their risk of falling.