자가 신장운동이 전방머리자세를 동반한 만성 목통증 환자의 자세개선에 미치는 영향

강정일 ( Jeong-il Kang ),정대근 ( Dae-keun Jeong ),박승규 ( Seung-kyu Park ),양대중 ( Dae-jung Yang ),김제호 ( Je-ho Kim ),문영준 ( Young-jun Moon ),백승윤 ( Seung-yun Baek ) 대한물리의학회 2020 대한물리의학회지 Vol.15 No.3

PURPOSE: The purpose of this study was to provide clinical basic data to reduce pain and improve function by comparing neck muscle activity and neck alignment using self-stretching and passive stretching exercises for chronic neck pain caused by forward head posture. METHODS: The subjects were divided into 15 subjects assigned to perform self-stretching exercise and 15 subjects assigned to perform passive stretching exercise. The intervention was conducted for a total of 4 weeks. The muscle activity in the neck was measured by surface electromyography (EMG) before intervention, and craniovertebral and cranial rotation angles were measured by X-ray. The 4-week intervention was conducted and the above items re-measured in the same manner and analyzed. RESULTS: Muscle activity within both groups after intervention using self-stretching or passive stretching exercise was significantly different (p < .05)(p < .01). Neck alignment of both groups was significantly different (p < .001)(p < .01). Further, muscle activities of the upper trapezius and splenius capitis muscles showed significant differences (p<.05). Lastly, neck alignment showed statistically significant difference (p < .05). CONCLUSION: Self-stretching exercise activated motor nerves as a posture correction exercise, thereby improving inhibition of muscle activity, muscle contraction delay, and pathological conditions of the muscle. For future research, interventions of self-stretching exercise will be needed for patients with chronic back pain accompanied by forward head posture, and various clinical studies on postural improvement of forward head posture by maintaining a normal muscle tone state are needed.

LED 구동 응용을 위한 고효율 경계모드 탭인덕터 부스트 컨버터의 분석과 설계

강정일(Jeong-il Kang),한상규(Sang-Kyoo Han),한종희(Jonghee Han) 전력전자학회 2013 전력전자학술대회 논문집 Vol.2013 No.11

흉곽저항운동이 만성폐쇄성폐질환 환자의 1초간 노력성 호기량과 피로도에 미치는 영향

강정일,정대근,박승규,이준희,Kang, Jeong-Il,Jeong, Dae-Keun,Park, Seung-Kyu,Lee, Jun-Hee 대한물리치료학회 2011 대한물리치료학회지 Vol.23 No.2

Purpose: The purpose of this study was to determine the effects of chest resistance exercise on Forced Expiratory Volume per second and on fatigue in patients with chronic obstructive pulmonary disease (COPD). Methods: In all, 62 male patients with COPD were included in this study. The experimental group included 32 patients who were treated with chest resistance exercise using the PNF technique with medication. The control group included 30 patients who were treated only with medication. Subjects were stratified into the 2 groups by randomized clinical sampling. Before the start of the experiment, forced expiratory volume at the first second (FEV1) and lactic acid were tested in both experimental and control groups. The experimental group did chest resistance exercise for 6 weeks, 4 times per week, 30 min per day, and the effects of this exercise in patients with COPD was determined by comparing the results of FEV1 and lactic acid tests before and after the experiment between and within the experimental and control groups. Results: There was a statistically significant within group difference for FEV1 MEAS and FEV1 %PRED. There was statistically significant control group of FEV1 MEAS and FEV1 %PRED There was a statistically significant difference in the experimental group for fatigue, comparing scores before and after the test. There was a statistically significant control group of fatigue, in comparison of between the groups of FEV1 MEAS, FEV1 %PRED, fatigue(p<0.01)(p<0.05). Conclusion: More research on COPD will be necessary for improving pulmonary function and reducing fatigue. Further studies on COPD will be required for improving pulmonary function and reducing of fatigue.

태극권이 노인의 균형과 센서 USN을 이용한 발목관절 근활성도에 미치는 영향

강정일,권혜민,Kang, Jeong-Il,Kwon, Hye-Min 한국전자통신학회 2015 한국전자통신학회 논문지 Vol.10 No.3

본 연구는 태극권이 노인의 균형과 센서 USN을 이용하여 발목관절 근활성도에 미치는 영향을 알아보기 위해 다음과 같이 실시하였다. 대상자는 65세 이상 노인 36명을 태극권을 시행한 실험군과 태극권을 하지 않은 대조군을 각각 18명씩 무작위 배정하였다. 실험군은 태극권을 주 3회 6주 동안 18회 실시하였다. 모든 대상자는 실험 전과 실험 후에 정적 및 동적균형검사와 센서 USN을 이용하여 발목관절 근활성도 변화를 측정하였다. 정적균형은 기능적 뻗기 검사, 동적균형은 외발서기검사 그리고 발목관절 근활성도 측정은 눈을 감고 발을 모아 서있는 자세에서 안뜰계에 평류안뜰 자극을 적용한 상태에서 측정하였다. 연구결과, 정적 및 동적균형 모두 두 집단 간 통계적인 차이를 나타냈고, 발목관절 근활성도 분석도 통계적으로 유의한 차이가 나타났다. 따라서 태극권이 노인에게 균형과 발목관절 근활성화에 효과적임을 알 수 있었다. The objective of this study was to effect of Tai Chi on balance and muscle activity of ankle joints with USN sensor in elderly people. Thirty six elderly participated and randomly assigned to a experimental group with Tai Chi and control group. The experimental group trained using a Tai Chi through 3 times per a week over 6 weeks. For all subjects, their balance such as functional reach test and one leg stance test, the change of muscle activity of ankle joints with USN sensor wireless-electromyogram during leg closed stance with eye closed were measured, and the results were as followed. The results were of a signigicant changes to the balance in group and between group as well. Comparison of muscle activity left tibialis anterior and left gastrocnemius in group, there were significant difference. Comparison of muscle activity right tibialis anterior and right gastrocnemius in group, there were significant difference. Comparison of muscle activity between groups, there was significant difference. Additional results indicated that, elderly people who received Tai Chi in one study, improve balance control and muscle activity ankle joint. so it is anticipated that improvement in clinical utilization for the elderly who's gait ability and balance ability reduced.

새로운 위상전이 병렬입력/직렬출력 모듈화를 적용한 듀얼 컨버터

강정일(Jeong-il Kang),노정욱(Chung-wook Roh),한상규(Sang-Kyoo Han),윤명중(Myung-Joong Youn) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11

A new phase shift PWM parallel-input/series-output modularized dual converter is proposed in this paper, This converter is operated with a fixed duty ratio and its output voltage is regulated by phase shift between each module, Since the operating duty ratio of each module is fixed, it is sufficient to implement a simple open loop drive circuitry for each module and the cost of total system can be much reduced, The operation of the converter is analyzed in this paper and verified by computer simulation

정상 노년층의 동심성 및 편심성 수축 시 대뇌 피질신경원 흥분도 비교

강정일,최현,Kang, Jeong-Il,Choi, Hyun 대한물리치료학회 2012 대한물리치료학회지 Vol.24 No.4

Purpose: This study was designed to analyze the differences in cerebral cortex activity of the elderly after extracting the movement related cortical potentials (MRCPs) from electroencephalogram (EEG) during a concentric and eccentric contraction of the elbow joint flexors, and entering them into the brain-mapping program to make the images. Methods: Right-dominant normal elderly people were divided into an eccentric contraction group and a concentric contraction group. Then, their MRCPs were measured using EEG and sEMG, during an eccentric and concentric contraction. Then, they were converted into images using the brain-mapping program. Results: Eccentric contraction group's $C_3$ and Cz showed statistically higher mean values of MRCP positive potential than the concentric contraction group. Conclusion: Researching a cerebral cortex activity, using MRCP, would provide basic data for clinical neuro-physiological researches on aging or neural plasticity of patients with a central nervous system injury.

A Study on Risk Factors of Chronic Lung Disease That Threatens National Happiness

Jeong-Il Kang(강정일),Dae-Keun Jeong(정대근) 한국엔터테인먼트산업학회 2015 한국엔터테인먼트산업학회논문지 Vol.9 No.3

국민의 건강을 위협하는 만성질환 중 폐질환은 현재 우리나라에서 사망률 4위로 오를 정도로 그에 따른 관심 또한 고조되고 있는 현실이다. 우리가 알고 있는 만성폐질환에서 골다공증의 위험인자로는 흡연, 낮은 체질량지수, 성선 저하, 비타민 D감소, 과도한 스테로이드 투약과 활동력 저하 등이 알려져 있지만, 폐기능의 시기별 요인 중 골다공증의 관련성이 높은 요인과 시점을 파악하는 것 역시 중요한 요소임을 인식하고 중재를 함에 있어 유념해야 할 필요성이 제시된다. 본 연구에서는 실험군I 보다 실험군II, 실험군III, 실험군IV에서 골밀도가 더 낮아짐을 나타내어 폐질환과 노출됨과 동시에 골다공증에 상당한 위험에 처해 있는 사실을 알 수 있었으며, 적혈구 수는 실험군IV, 실험군III, 실험군II 보다 실험군I에서 낮게 나타났고, 백혈구와 C-단백수치에서는 실험군I 보다 실험군III에서 높았으며, 실험군IV에서 가장 높게 나타났다. 혈청검사의 특징으로는 신체적 염증반응들은 주로 중증에서 심화되는 것으로 나타났고, 흡연과 스테로이드제의 사용역시 골다공증을 일으키는 위험요소로 작용하는 결과를 알 수 있었다. 향 후 임상에서 폐질환 환자의 치료지침을 설정함에 있어 비록 경증 단계라고 하더라도 폐기능의 치료뿐만 아니라 골다공증과 그 위험요소를 같이 인식할 필요성이 제시되며, 폐질환을 관리하는데 중요한 사항 중 하나로 사료된다. This study aims to compare the change patterns vs. risk factors of osteoporosis depending on the classification of the severity of pulmonary function in patients with chronic pulmonary disease, identify the highly relevant factors and points of time among the patient"s period-specific factors, and provide basic analytical data of osteoporosis in patients with chronic pulmonary disease. This study targeted 48 outpatients who were receiving outpatient treatment after being diagnosed with chronic obstructive pulmonary disease at H hospital located at South Jeolla Province. All of them were classified into four groups depending on the classification of the severity of GOLD, and bone density was measured from each group in order to measure and compare the related risk factors. As a result, there was a significant difference in body weight, BMI, FEV1 in FEV1/FVC (p<0.001); there was also a significant difference in changes of T-score between experimental groups (p<0.01); and there was a significant difference in red blood cell count, white blood cell count, and C-protein and erythrocyte sedimertation rate (p<0.01)(p<0.01). It was found that patients with chronic obstructive pulmonary disease were exposed to diseases and simultaneously to the risk of osteoporosis. Physically, inflammation reactions got worse largely in serious cases. Smoking and steroid use were also risk factors. Thus, it is considered that the risk factors should be recognized simultaneously according to the classification of severity as well as pulmonary function in treatment manuals for the patients with chronic obstructive pulmonary disease.

깊은 목굽힘 강화운동이 만성뇌졸중 환자의 폐기능과 호흡근활성도에 미치는 영향

강정일(Jeong-il Kang),정대근(Dae-Keun Jeong) 인문사회과학기술융합학회 2019 예술인문사회융합멀티미디어논문지 Vol.9 No.9

본 연구는 뇌졸중 환자에게 깊은 목 굽힘 강화운동을 중재하여 호흡근의 변화와 예후 및 폐기능 정도를 파악함으로써 호흡의 기능향상을 위한 임상적 중재방법 설정에 대한 임상적 기초자료를 제시하고자 한다. 실험 전 호흡근 운동을 중재한 9명을 대조군으로 호흡근 운동을 병행하여 깊은 목굽힘 강화운동을 중재한 11명을 실험군으로 중재 전 폐활량측정기를 이용하여 폐기능을 알아보고 호흡보조근 활성도를 알아보기 위하여 표면근전도를 측정한 후 이들의 항목을 동일하게 재측정하여 비교 분석하였다. 실험결과 대조군 집단 내 변화비교에서는 FEV1과 FVC에서 유의하게 증가하였으며(p<0.05), 목빗근과 앞목갈비근에서 유의한 차이가 있었다(p<0.05). 실험군 집단 내 변화비교에서 폐기능은 FEV1과 FVC에서 유의한 차이가 있었으며(p<0.01)(p<0.05), 목빗근과 앞목갈비근에서 유의하게 증가하였다(p<0.001). 집단 간 변화비교에서는 목빗근과 앞목갈비근에서만 차이가 있었다(p<0.05). 뇌졸중 환자에게 깊은 목 굽힘강화 운동은 이 근육들의 협응능력을 잘 유지하여 잘못된 수축을 감소시켜 호흡을 보조해주기 위한 중재방법으로 향 후 뇌졸중 환자에게 호흡운동 시행 시 목의 기능적인 측면을 향상하기 위한 연구가 필요할 것으로 판단된다. The purpose of this study is to present clinical basic data on the establishment of clinical intervention method for improvement of respiratory function by understanding the changes of respiratory muscle, prognosis and pulmonary function by mediating deep neck flexion exercise in stroke patients. Nine patients who mediated respiratory muscle exercise before the experiment as a control group, and 11 patients who mediated deep neck flexion exercise by the respiratory muscle exercise as a control group. Four weeks after measuring EMG, the items were re-measured in the same manner and analyzed. The experimental results showed that the change in the control group was significantly increased in FEV1 and FVC (p<0.05) and significantly increased in the neck and anterior ribs (p<0.05). Pulmonary function was significantly different between FEV1 and FVC (p<0.01) (p<0.05) and significantly increased in neck and anterior ribs (p<0.001). There was a difference only between the neck and anterior ribs in the comparison of changes among the groups (p<0.05). Deep neck flexion exercise for stroke patients is a mediation method to maintain the joints of these muscles to reduce false contraction and to assist breathing. I think it will be necessary

고승압비 응용을 위한 전류연속 모드 탭인덕터 부스트 컨버터의 무손실 스너버

강정일(Jeong-il Kang),한상규(Sang-Kyoo Han),한종희(Jonghee Han) 전력전자학회 2013 전력전자학술대회 논문집 Vol.2013 No.11

영전압 스위칭 PWM 하프 브릿지 컨버터의 모델링 및 분석

강정일(Jeong-il Kang),정영석(Young-Seok Jung),노정욱(Chung-Wook Roh),윤명중(Myung-Joong Youn) 전력전자학회 1997 전력전자학술대회 논문집 Vol.1997 No.-

The circuit effects due to the transformer primary side series equivalent inductance in the Zero Voltage Switching Pulse Width Modulated Half Bridge DCIDC Converter and its impact on the effective duty are analyzed. The steady state equations and the small signal model of the converter are derived incorporating the effects of the complementary control and the utilization of transformer primary side series equivalent inductance. The open loop plant dynamics are analyzed on the basis of the model derived. The model predictions are confirmed by experimental measurements.