• PNF and Movement
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• v.20 no.1
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• pp.135-145
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• 2022

Purpose: The purpose of this study was to investigate the association between cognitive and motor inhibition by comparing muscle activity and ground reaction force during unplanned gait termination according to reaction time measured through the stop-signal task. Methods: Sixteen young adults performed a stop-signal task and an unplanned gait termination separately. The subjects were divided into fast and slow groups based on their stop-signal reaction time (SSRT), as measured by the stop-signal task. Electromyography (EMG) and ground reaction force (GRF) were compared between the groups during unplanned gait termination. The data for gait termination were divided into three phases (Phase 1 to 3). The Mann-Whitney U test was used to compare spatiotemporal gait parameters and EMG and GRF data between groups. Results: The slow group had significantly higher activity of the tibialis anterior in Phase 2 and Phase 3 than the fast group (p <0.05). In Phase 1, the fast group had significantly shorter time to peak amplitude (TPA) of the soleus than the slow group (p <0.05). In Phase 2, the TPA of the tibialis anterior was significantly lower in the fast group than the slow group (p <0.05). In Phase 3, there was no significant difference in the GRF between the two groups (p >0.05). There were no significant difference between the two groups in the spatiotemporal gait parameters (p >0.05). Conclusion: Compared to the slow group, the fast group with cognitive inhibition suppressed muscle activity for unplanned gait termination. The association between SSRT and unplanned gait termination shows that a participant's ability to suppress an incipient finger response is relevant to their ability to construct a corrective gait pattern in a choice-demanding environment.

• Journal of Korea Multimedia Society
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• v.13 no.12
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• pp.1778-1785
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• 2010

This paper proposes a new video-based method of analyzing human gait which is a highly variable dynamic process. It captures a human gait of varying directions as a trajectory in the phase space. The proposed method includes two options of a stochastic process model and a self-organizing feature map as the tool of feature space representation and analysis. Test results show that the model is highly intuitive and we believe it can contribute to our understanding of human activity as well as gait behavior.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.65 no.2
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• pp.130-135
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• 2016

Gait recognition has advantage of non-contact type recognition. But It has disadvantage of low recognition rate when the pedestrian silhouette is changed due to bag or coat. In this paper, we proposed new method using combination of gait energy image feature and thermal face image feature. First, we extracted a face image which has optimal focusing value using human body rate and Tenengrad algorithm. Second step, we extracted features from gait energy image and thermal face image using linear discriminant analysis. Third, calculate euclidean distance between train data and test data, and optimize weights using genetic algorithm. Finally, we compute classification using nearest neighbor classification algorithm. So the proposed method shows a better result than the conventional method.

• Korean Journal of Applied Biomechanics
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• v.17 no.4
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• pp.9-16
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• 2007

The purpose of this study was to analyze the effects of after aquatic exercise on gait in the Falls Experienced elderly. There were one group : Fall Experienced Elderly Women(n=8). They were tested on their gait (Elapse time of each phase, Stance time of limb, Stride length, Velocity of segment). we took video and analyzed their movement using Ariel Performance Analysis System and compared gait parameters. For data analysis, mean and standard deviation scores were calculated, and correspondence sample t-test and pearson's correlation analysis were used. First, after exercise is short than before exercise on Elapse time of each phase, fall-experience subjects showed meaningful total time. Second, after exercise is short than before exercise on Stance time of limb and Stride length, fall-experience subjects showed meaningful Stride length. Third, after exercise is fast than before exercise on Velocity of segment.

• The Korean Journal of Rehabilitation Nursing
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• v.9 no.1
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• pp.42-48
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• 2006

Purpose: The purpose of this study was to explore the effect of Tai Chi exercise on pain, balance, gait and physical function of patients with low back pain. Method: This study was designed one group pretest-posttest design. Tai Chi exercise was conducted by researcher and carried out for sixty minutes per one time and two times a week for six weeks. The subjects of this study consisted of 23 low back patients. Using the SPSS win 10.0 program was used for data analysis, which included frequency, percentage and paired t-test. Result: Tai Chi exercise decreased pain, improved balance and gait, increased physical function(back muscle strength, leg muscle strength and flexibility). Conclusion: The results suggested Tai Chi exercise can be effective nursing intervention to improve pain, balance, gait and physical function of patients with low back pain.

• Physical Therapy Rehabilitation Science
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• v.1 no.1
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• pp.17-21
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• 2012

Objective: To investigate the effect of long-term water exercise on gait parameters in the elderly post stroke patients. Design: One group pretest-posttest design. Methods: Twenty elderly post stroke patients (age: $56.5{\pm}10.1$ years, height: $168.6{\pm}5.8cm$, body mass: $69.3{\pm}6.9kg$, handicapped level: $2.5{\pm}0.8$) participated in this study. Participants took part in gait training of 1 hour per day, three days per week, for three months. Participants' gaits were analyzed to find the effect of 3 months water exercise by a 3-D motion analysis with 8 infrared camera and 1 force plate (sampling frequency: 100 and 1,000 Hz, respectively). A paired t-test was used to find the significance with significant level as 0.05. Results: Gait velocity, step length & step width significantly increased, and asymmetric index for gait parameters significantly decreased after the water exercise (p<0.05). Conclusions: The water exercise effectively affect on patients' gait ability and electromyography analysis will be needed further study.

• Physical Therapy Korea
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• v.11 no.3
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• pp.19-24
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• 2004

The purposes of this study were to analyze gait patterns of patients with chronic lumboscaral radiculopathy and to investigate gait parameters which can reflect a functional deficit in relation to the level of lumbosacral radiculopathy. The study population consisted of 25 patients of chronic lumbosacral radiculopathy and 25 healthy control subjects. Conventional physical examinations and three-dimensional gait analyses were performed on all participants. The data were analyzed using an independent sample t-test. The results were as follows: (1) In the patients' group, cadence, walking velocity, stride length and double support time were less than in the control group (p<.05). (2) In the patients' group, maximum flexion of hip, maximum flexion of loading response, maximum flexion of swing phase on the knee and maximum plantar flexion of pre-swing were less than the control group (p<.05). Using three-dimensional gait analysis, we could identify specific gait parameters to reflect a functional deficit related to the level of lumbosacral radiculopathy.

• Journal of Korean Physical Therapy Science
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• v.20 no.1
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• pp.89-98
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• 2013

Purpose : The purpose of this study was to investigate the effect of the aquatic exercise program on lower muscle strength, balance and gait activity on 12 weeks aquatic exercise program in the elderly women. Methods : The Subjects in this study were 20 aged 70s who were long-term residents admitted to elderly nursing home of S, Gyeongsangnam province. They performed aquatic exercise programs 60-minute sessions, 3 times a week for 12 weeks. The physical evaluation was used for measuring lower muscle strength, balance activity was used for measuring balance testing, and gait activity was used for measuring gait velocity and maximal step length evaluation. All data were analyzed by paired t-Test by SPSS(version18.0). P-values of <.05 were considered significant. Results : Lower extremity muscle strength, static dynamic balance and gait activity were significantly increased both in the exercise group and between groups. Conclusion : This study suggests that aquatic exercise program has an effect on lower extremity muscle strength, balance and gait activity of the elderly women. Therefore, it is considered as a safe and helpful self-support activity for the elderly people.

• The Journal of Korean Physical Therapy
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• v.16 no.2
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• pp.44-53
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• 2004

Treadmill training is a new promising therapy in gait rehabilitation of patients with hemiplegia. The purpose of this study was to identify the effect of treadmill training on walking speed and gait endurance in patients with chronic hemiplegia. The subject of this includes twenty patients, who had suffered from chronic hemiplegia and were in the K rehabilitation center; each ten patients were randomly assigned to experimental or control group. Among twenty patients, one group of ten for experiment was treated with progressive speed increase treadmill ambulation traing besides conventional physical therapy(SITAT) while the rest ten for the controlled group was treated with conventional physical therapy(CPT) only, for 8 weeks alike. Before and after the foregoing 8 weeks training, walking velocity and gait endurance were measured to both groups. The data were analyzed by paired t-test. The results of this study are as follows; The SITAT and CPT showed the significant difference in walking velocity and gait endurance. As compared the rehabilitation of dependent varibles between the SITAT and CPT, SITAT showed the significant difference in walking velocity and gait endurance. The outcome suggest that patient with chronic hemiplegia can improve their walking velocity and gait endurance throught treadmill training.

• Journal of International Academy of Physical Therapy Research
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• v.5 no.2
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• pp.708-713
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• 2014

The aim of this research was to investigate how the effects of body supported treadmill training with visual feedback affect the gait factors of stroke patients. Thirty subjects (21 male, 9 female) with a diagnosis of stroke were taken to the hospital to participate in this study. The subjects received body supported treadmill training with visual feedback. The training was executed for 6 minutes, 3 times a day per week for 19 weeks after general exercise. The effects of the visual feedback in the body supported treadmill training were evaluated by measuring the average gait cycle and the average step length of the affected and unaffected. The collected data were statistically analyzed by using a paired t-test. The results of this study were a significant improvement of the average gait cycle and no statistically significant difference of the average step length. The gait cycle average had a statistically significant difference in gender, age, etiology, paretic side, and step length average. There was no statistically significant difference in infarction within etiology. Therefore, it was necessary to apply the easy and simple with the treadmill training in the rehabilitation of the stroke patients. This study will require a variety of outcome measures related to the effects of treadmill training with gait factors.