• The Journal of Korean Physical Therapy
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• v.24 no.5
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• pp.348-354
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• 2012

Purpose: This study examined the effects of computerized feedback postural training on the balance and electromyography activity of subjects with stroke. Methods: A total of 30 chronic stroke patients were enrolled in this study. Subjects were divided into an experimental group (n=15) and a control group (n=15). Computerized feedback postural training was used in the experimental group. Both groups received intervention for six weeks, 5 times per 30 minutes period. Data analysis was performed using analysis of covariance for determination of statistical significance. Results: Significant difference in static and dynamic balance was observed in the experimental group, compared with the control group (p=0.05), and a significant difference in muscle activity was observed in the gastrocnemius muscle, quadriceps muscle, and elector spinae muscle. However, the hamstring muscle showed no significant difference. Conclusion: Computerized feedback postural training is more effective in improving the ability of balance and muscle activity than neurological physical therapy.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.05a
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• pp.136-141
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• 2002

This paper presents a design and a control of a biped walking RGO-robot and dynamic walking simulation for this system. The biped walking RGO-robot is distinguished from other one by which has a very light-weight and a new AGO type with servo motors. The gait of a biped walking RGO-robot depends on the constrains of mechanical kinematics and initial posture. The stability of dynamic walking is investigated by ZMP(Zero Moment Point) of the biped walking RGO-robot. It is designed according to a human wear type and is able to accomodate itself to human environments. The joints of each leg are adopted with a good kinematic characteristics. To test of the analysis of joint kinematic properties, we did the strain stress analysis of dynamic PLS and the study of FEM with a dynamic PLS. It will be expect that the spinal cord injury patients are able to train effectively with a biped walking AGO-robot.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.05a
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• pp.238-243
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• 2002

This paper presents a design and a control of a biped walking AGO-robot and dynamic walking simulation for this system. The biped walking RGO-robot is distinguished from other one by which has a very light-weight and a new RGO type with servo motors. The gait of a biped walking AGO-robot depends on the constrains of mechanical kinematics and initial posture. The stability of dynamic walking is investigated by ZMP(Zero Moment Point) of the biped walking AGO-robot. It is designed according to a human wear type and is able to accomodate itself to human environments. The joints of each leg are adopted with a good kinematic characteristics. To test of the analysis of joint kinematic properties, we did the strain stress analysis of dynamic PLS and the study of FEM with a dynamic PLS. It will be expect that the spinal cord injury patients are able to train effectively with a biped walking RGO-robot.

• The Journal of Korean Physical Therapy
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• v.26 no.5
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• pp.372-378
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• 2014

Purpose: The aim of this study was to evaluate the effect of side walking training with an elastic-band on gait and balance ability of stroke patients. Methods: Twenty three patients with stroke participated in the study. Participants were randomly assigned to the side walking with elastic-band group (n=7), the side walking without elastic-band group (n=8), and the walking on the treadmill group (n=8);. 10 m walking test (10MWT), Dynamic Gait Index (DGI), Berg Balance Scale (BBS), and modified Functional Reach Test (mFRT) were performed for evaluatione of pre- and post-intervention in gait and balance ability of participants. Results: Significantly differences in 10 MWT, DGI, BBS, and mFRT were observed between pre- and post-intervention in three groups (p<0.05). Improvement of pre- and post-intervention of mFRT showed significant difference (p<0.05). The highest rate of change was observed in the side walking with elastic-band group and rate of change showed in the order of the side walking without elastic-band group, walking on the treadmill group. Conclusion: This study suggests that side walking training with an elastic-band may help to improve gait and balance ability of stroke patients.

• Journal of the Korean Society of Physical Medicine
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• v.11 no.1
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• pp.115-125
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• 2016

PURPOSE: The purpose of this study was to compare the effects of task-oriented training and virtual reality training on upper extremity function, balance ability, depression in stroke patients. METHODS: Forty stroke patients were randomly allocated into a task oriented training group (TTG, n = 20), a virtual reality training group (VRG, n = 20). Both groups received the usual physical therapy. In addition, TTG patients underwent task training such as sweeping the table, cup stacking, carrying wood block. VRG patients underwent virtual reality training using X-box kinect. Both groups received 30 minutes of training per day, five times per week, for twelve weeks. RESULTS: After intervention, both groups showed significant improvement on upper extremity function, balance ability, and depression. VRG showed more improvement on upper extremity function, balance ability, and depression than TTG. CONCLUSION: According to the results of this study, task-oriented training and virtual reality training are feasible and suitable for stroke patients. And virtual reality training is more effective method than task oriented training.

• Journal of Institute of Control, Robotics and Systems
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• v.20 no.9
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• pp.971-976
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• 2014

Haptic device can be a useful rehabilitation tool in balance training. The proposed system is composed of a body-wear smartphone, Phantom Omni(R) device, and its control PC system. Ten young healthy subjects performed balance tasks with different postures during 30 seconds with their eyes closed. An Android program on the smartphone transferred mediolateral (ML) and anteroposterior (AP) tilt angles to the PC system, which can generate haptic command through haptic device. Statistical data analysis was performed using MATLAB(R). COP (Center of Pressure) related indexes were measured to see reduction in body sway. ANOVA showed that haptic device significantly reduced body sway. Intuitive balance guidance could be generated using an economical and small-sized commercial haptic device, making the system efficient.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.20 no.2
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• pp.1-7
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• 2014

Purpose: The purpose of this study was to compare the effects of the balance training on the stable and unstable supporting surfaces for the subjects with functional ankle instability. Methods: Twenty-nine subjects with functional ankle instability were randomly assigned to the stable group (n=14) and the unstable group (n=15). Balance training was conducted twenty minutes a day on the stable surface for the stable group and on the airostep for the unstable group three times a week for four weeks. Balance training program was consisted of ten steps by eye opened or closed and two or one leg standing. X-speed for transverse balance and Y-speed for longitudinal balance were measured with eye opened and closed in affected leg standing position. Results: There were significant improvements of balance ability in eye opened (p<.01) and eye closed standing (p<.01) in stable group. Unstable group also showed significant improvements of balance ability in eye opened (p<.01) and eye closed standing (p<.01). There were no statistical differences in the magnitude of improvement between the groups (p<.05). Conclusions: Based on such results, it can be said that balance training on the stable surface is effective as much as training on the unstable surface for the subjects with functional ankle instability.

• Physical Therapy Korea
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• v.22 no.2
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• pp.11-20
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• 2015

The purpose of this study was to evaluate the effect of dual-task training with cognitive effort on the walking and balance functions of chronic stroke patients. The study included 14 chronic stroke patients, who were randomly divided into the experimental group (EG) and control group (CG), each with 7 patients. The EG performed the dual-task training with cognitive effort 3 times a week, 30 minutes for 4 weeks, where as the CG performed single-task training three times a week, for 30 minutes for 4 weeks. Outcome assessments were made with 10 m walk test, timed up and go test, 6 minutes walk test, and Berg balance scale. In within-group comparison, subjects from the EG showed significant differences in all variables (p<.05), while subjects from the CG showed only significant differences in 6 minutes walk test, and Berg balance scale (p<.05). Further, there was significant difference in the improvement rate of 10 m walk test. The findings suggest that the dual-task with cognitive effort may be beneficial for improving walking and balance functions of patients with chronic stroke.

• Physical Therapy Korea
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• v.21 no.2
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• pp.18-27
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• 2014

The purpose of this study was to examine the effects of dual-task training (cognitive and exercise tasks) on the balance and gait performance of chronic stroke patients. Eighteen subjects with chronic stroke were divided equally into two groups, an experimental group and a control group. Subjects in both groups participated in an exercise program, performing the same tasks, for 45 minutes per day, three times per week for four weeks. The experimental group also performed additional cognitive task. The experimental group showed a more significant improvement than the control group on the Berg Balance Scale, the Timed Up and Go Test, the Korean Activities-Specific Balance Confidence Scale, and the Functional Gait Assessment (p<.05). The cognitive task error rates in the final week were significantly less than in the first week in the experimental group (p<.01). These results suggest that dual-task training for chronic stroke patients is effective in improving balance, gait, and cognitive abilities.

• The Journal of Korean Physical Therapy
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• v.22 no.4
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• pp.7-14
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• 2010

Purpose: The goal of this study was to investigate the effect of balance and gait ability through two motor dual task training in chronic stroke subjects. Methods: A group of twenty-five subjects who were six months post stroke participated in this study, where they were designated into pretest-posttest control The subjects were randomly allocated into two groups: experimental (n=13) and control (n=12). Both groups received physical therapy for 5 session 30 minutes per week during 6 weeks. Experimental group practiced additional two motor dual task training programs for thirty minutes a day, three days a week during six weeks. Evaluation of results was obtained through analyzing static balance, dynamic balance and gait function. Results: There was significant improvement among the group that practiced the additional two motor dual task training in that the postural sway area with open eye and close eye on the foam surface, the dynamic balance (p<0.05), and the gait function (p<0.05). Conclusion: Two motor dual task training improved static balance on the foam, dynamic balance, gait function. These results suggest that two motor dual task training is a feasible and suitable treatment for individuals with chronic stroke.