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신화경,조상현,차광석 한국전문물리치료학회 2003 한국전문물리치료학회지 Vol.10 No.1
Ⅰ. 서론 Ⅱ. 연구방법 1. 연구대상 2. 실험설계 3. 근력강화훈련 4. 최대 근력의 평가 5. 표면근전도 신호 수집 가. 장비 설정 나. 표면근전도 신호 수집 6. 신호 처리 가. 주파수 스펙트럼 분석 나. 적분EMG 7. 통계분석 가. 정규화 나. 통계분석 Ⅲ. 결과 1. 근육 둘레의 변화 2. 적분EMG와 근수축력의 변화 가. 등척성 운동 나. 등장성 운동 다. 12주 동안 근력과 적분EMG의 변화 3. 초기중앙주파수의 변화 4. 피로지수의 변화 5. 회귀직선 기울기의 변화 Ⅳ. 고찰 Ⅴ. 결론 This study tested whether repeated measurement of median frequency (MDF)-related variables could express the muscle power changes during a 12-week DeLome strengthening program, by using consecutive overlapping FFT (Fast Fourier transformation) and integrated EMG (IEMG) from surface EMG data for isometric and isotonic exercise. To evaluate the effect of training, the following were recorded every 3 weeks for the elbow flexors and knee extensors of 5 healthy male volunteers: MVC, 1RM, limb circumference, and surface EMG during isometric MVC or isotonic contraction at 10RM load. From the EMG data, IEMG and variables from a regression analysis between MDF and time were obtained. MVC, 1RM, IEMG, and initial MDF increased linearly over the training period. The fatigue index and slope of the regression line increased temporarily until the 6th week and decreased thereafter. From these results, there appeared to be enhanced neural recruitment of fast twitch fibers in the first 6 weeks and continued enhancement in the recruitment and hypertrophy of fast twitch fibers, which led to increased fatigue resistance, over the last 6 weeks. Accordingly, the MDF and IEMG analysis technique could demonstrate the effect of the program detected significant changes in both isometric and isotonic contractions. EMG analysis methods can be used to estimate the electrophysiological and histological changes in skeletal muscles during a strengthening program.
기능적 근력강화 운동이 뇌성마비 아동의 기립균형에 미치는 영향
신화경,정보인 한국전문물리치료학회 2001 한국전문물리치료학회지 Vol.8 No.3
The purpose of this study was to investigate the effect of functional strengthening exercise on static and dynamic standing balance in a child with cerebral palsy. The subject was a 7 year old boy with diplegia whose Gross Motor Function Measure (GMFM) score was 80% along with Gl of the lower extremities in Modified Ashworth Scale. The subject was ambulatory with some degree of limitation and demonstrated muscle weakness and strength asymmetry in the lower extremities. A changing criterion design for a single-subject research was used for this study. The functional strengthening exercise consisted of lower extremity ergometer exercise and knee exercise with grading movement in standing position, each for 20 minutes, which lasted 18 sessions for 6 weeks. A knee extensor strength test on both extremities and standing balanice test were conducted after each functional strengthening exercise. Two types of standing balance were tested: one leg stance test and functional reach test. One leg stance test was to evaluate static standing balance, and functional reach test was to evaluate dynamic standing balance. The results showed that the functional strengthening exercise had some positive effects on improvement of both static and dynamic standing balance, and there was a positive correlation between the knee strength and standing balance.
The Effects of Initiation Side on Gait Symmetry in the Stroke Patients
신화경,노대용 대한물리치료학회 2013 대한물리치료학회지 Vol.25 No.6
Purpose: To investigate the effects of initiation side on gait symmetry in the chronic stroke patients. Methods: Twenty one patients with independent gait after stroke were divided into the paretic-leg gait initiation group (PLI) and the nonparetic-leg gait initiation group (NPLI). The symmetry ratio (SR) was calculated from of the spatiotemoral and kinematic parameter which measured by 3D motion analysis. Results: In the spatiotemporal variables, SR-step length and SR-velocity was significantly different between groups (p<0.05). In the kinematic variables, SR-TOAA and SR-SwPAA of the hip joint was significantly different between groups (p<0.05). Conclusion: We suggest that the initiating leg may influence on the gait symmetry of stroke patient These results will be a helpful reference in hemiplegic gait training or intervention.
Quantitative EMG Changes During 12-Week DeLorme's Axiom Strength Training
신화경,조상현,이영희,권오윤 연세대학교의과대학 2006 Yonsei medical journal Vol.47 No.1
Strength training is one of the most common exercises practiced in the field of physical therapy or sports training. However, limited methodology is available to evaluate its effect on the target muscle. This study aimed to test the hypothesis that surface electromyographic (EMG) data from both isometric and isotonic exercise can express changes within the muscle during a 12-week strength training program. Ten healthy male volunteer students (5 for training, 5 for controls) from Yonsei University were recruited for evaluation in this study. DeLorme's axiom was practiced for 12 weeks in the dominant elbow flexors and knee extensors of the training group. Tension for 1 repetition maximum and maximal voluntary isometric contraction, and surface EMG information such as the integrated EMG and three variables from the regression line of median frequency (MDF) data were measured at weeks 0, 3, 6, 9, and12. The limb circumference was measured at weeks 0 and 12. During the strength training, which was enough for the increment of muscle strength and limb circumference, the rectified-integrated EMG and initial MDF increased with a significant linear pattern in both types of contraction. The two surface EMG variables were able to monitor the physiologic muscle changes during the training. Based on these results, we propose that these two surface EMG variables can be used for monitoring electrophysiological changes in the specific muscle that is undergoing the training program, under conditions where the contraction mode for EMG data collection is either static or dynamic.
한국 주거공간용어 변화에 대한 기초 연구 -문학작품에 나타난 용어를 중심으로-
신화경,김대년,서귀숙,오혜경,최경실 한국주거학회 1998 한국주거학회 논문집 Vol.9 No.2
The purpose of this study is to scrutinize the change of Korean dwelling space terms, and confirm the value of literature as data for a study on dwelling space terms. The terms, which describe the dwelling space, were selected in 63 Korean literature. The terms about rooms, working spaces, space for physiology and hygienic, and storage spaces, were analyzed. The terms about rooms were classified by a constituent unit of traditional housing, location, size, function, and so on. Among them, the number of terms about function had increased more and more. These terms were changed by housing size, housing form, structure of house and household, family size, and so on. It was confirmed that literatures have utility values for a study on change of dwelling space terms. In next study, it is required to analyze the meaning and usage of Korean dwelling space terms, and to compare terms in floorplans with terms in literature.
신문광고를 통해 본 시대별 주거가치 변화에 관한 연구 -아파트 관련 광고를 중심으로-
신화경 한국주거학회 1998 한국주거학회 논문집 Vol.9 No.1
This study was designed to know the change of housing values from 1960s to the present, for finding the directions of housing design and housing policy. The content analysis method was used for this study. Data were collected through advertisement about apartment in newspaper, and the sample consisted of 781 advertisements. Frequency, percentage and x2-test were used. The results showed that housing values were changed according to the times. Especially, the economic value, the convenience value, the family centrism value, the location value, and the educational environment value were changed.