• Nutrition Research and Practice
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• 제2권2호
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• pp.107-113
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• 2008

This study was done to investigate the relationship between the perception of body image, body weight satisfaction or dietary behavior and self-rated health status in Korean college students. Subjects, 285 college students, were divided into three groups (healthy, normal, and unhealthy) according to the answer for the self-rated health question. Information about demographic status, self-rated health condition, height and weight, perception of body image, satisfaction of body weight, concern for body weight control, dietary behavior, nutritional knowledge, and health-related characteristics collected by a self-reported questionnaire. The proportion of men and women in each group was not significantly different. The academic year, major, experience of nutritional education, and type of residence were not significantly related with self-rated health but the pocket money range was significantly associated (p<0.05) with self-rated health. The proportion of subjects rated their health as unhealthy was the lowest in 210-300 thousand won pocket money range and was increased in less than 210 thousand won or over 300 thousand won pocket money ranges. There were no significant differences for age, height, weight and BMI between the groups. The body image perception and body weight satisfaction levels of healthy group was significantly higher than those of unhealthy group (p<0.01 and p<0.001, respectively), but the level of concern for body weigh1 control in healthy subjects was significantly lower than that in unhealthy subjects (p<0.05). The proportion of subjects reported as healthy was significantly increased with increased frequencies of following food behaviors; weekly use of protein foods (p<0.01), vegetables (p<0.05) and dairy products (p<0.01), and food habits such as "regularity of meal time" (p<0.01), "eating in moderation" (p<0.05), and "eating breakfast" (p<0.001). Overall results suggested that the college students have tended to have a better perception of health when they have better body image perception, body weight satisfaction and dietary behaviors.

• Nutrition Research and Practice
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• 제13권2호
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• pp.126-133
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• 2019

BACKGROUND/OBJECTIVES: The glycemic index (GI) is a measure of the postprandial glucose response (PPGR) to food items, and glycemic load (GL) is a measure of the PPGR to the diet. For those who need to maintain a healthy diet, it is beneficial to regulate appropriate levels of blood glucose. In reality, what influences the meal GI or GL depends on the macronutrient composition and the physical chemistry reactions in vivo. Thus, we investigated whether different macronutrients in a meal significantly affect the PPGR and the validity of calculated GI and GL values for mixed meals. SUBJECTS/METHODS: 12 healthy subjects (6 male, 6 female) were recruited at a campus setting, and subjects consumed a total of 6 test meals one by one, each morning between 8:00 and 8:30 am after 12 h of fasting. PPGR was measured after each consumed meal and serial finger pricks were performed at indicated times. Test meals included 1) 68 g oral glucose, 2) 210 g rice, 3) rice plus 170 g egg white (RE), 4) rice plus 200 g bean sprouts (RS), 5) rice plus 10 g oil (RO), and 6) rice plus, egg white, bean sprouts, and oil (RESO). The incremental area under the curve (iAUC) was calculated to assess the PPGR. Mixed meal GI and GL values were calculated based on the nutrients the subjects consumed in each of the test meals. RESULTS: The iAUC for all meals containing two macronutrients (RS, RO, or RE) were not significantly different from the rice iAUC, whereas, the RESO iAUC ($2,237.5{\pm}264.9$) was significantly lower (P < 0.05). The RESO meal's calculated GI and GL values were different from the actual GI and GL values measured from the study subjects (P < 0.05). CONCLUSIONS: The mixed meal containing three macronutrients (RESO) decreased the PPGR in healthy individuals, leading to significantly lower actual GI and GL values than those derived by nutrient-based calculations. Thus, consuming various macronutrient containing meals is beneficial in regulating PPGR.

• International Journal of Vascular Biomedical Engineering
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• 제3권1호
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• pp.14-22
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• 2005

In the present study, our aim is to investigate whether responses to the head-up tilt (HUT) on nonlinear properties of heart rate variability (HRV) in young and elderly subjects are different or not. Thirteen young-healthy subjects ($24.5{\pm}3.7$ years) and 18 old-aged healthy subjects ($74.5{\pm}7.4$ years) participated in this study. An electrocardiogram (ECG) in the supine posture, at $0^{\circ}$, and in the standing posture, at $70^{\circ}$ of head-up tilt, was recorded. Detrended fluctuation analysis (DFA) and approximate entropy (ApEn), measures of short-/long-term correlation properties and overall complexity of heart rate (HR) respectively, along with spectral components of HR variability (HRV) were analyzed for both the supine and HUT postures. We observed that the short-term fractal exponent ${\alpha}_1$ increased during HUT posture (F(1, 29) = 39.79, P = 0.000), especially, the young subjects showed a significantly higher values compared to the elderly subjects. ApEn significantly decreased (F(1, 29) = 8.61, P = 0.006) during HUT posture. HUT posture decreased the complexity in HR dynamics and increased short-term fractal exponent values in young subjects but not in elderly subjects. These results imply that there are differences of response to HUT on nonlinear properties between young and elderly subjects.

• 한국운동역학회지
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• 제25권1호
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• pp.123-130
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• 2015

Purpose : The purpose of this study was to investigate the reliability of 3D-inertia measurement unit (IMU) based shoes in gait analysis. This was done with respect to the results of the optical motion capturing system and to collect reference gait data of healthy subjects with this device. Methods : The Smart Balance$^{(R)}$ system of 3D-IMU based shoes and Osprey$^{(R)}$ motion capturing cameras were used to collect motion data simultaneously. Forty four healthy subjects consisting of individuals in 20s (N=20), 40s (N=13), and 60s (N=11) participated in this study voluntarily. They performed natural walking on a treadmill for one minute at 4 different target speeds (3, 4, 5, 6 km/h), respectively. Results : Cadence (ICC=.998), step length (ICC=.970), stance phase (ICC=.845), and double-support phase (ICC=.684) from 3D-IMU based shoes were in agreement with results of optical motion system. Gait data of healthy subjects according to different treadmill speeds and ages were matched to previous literature showing increased cadence and reduced step length for elderly subjects. Conclusion : Conclusively, 3D-IMU based shoes in gait analysis were a satisfactory alternative option in measuring linear gait parameters.

• Progress in Superconductivity
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• 제5권1호
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• pp.38-44
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• 2003

The aim of this study is to confirm clinical usefulness of magnetocardiogram (MCG) by analyzing MCG data of health subjects and patients with Wolff-Parkinson-White (WPW) syndrome and dilated cardiomyopathy (DCM). Measurement of MCG signals was done with a home-made 40-channel SQUID system. MCG signals of 30 healthy subjects were measured as the reference of MCG signals. Among the DCM patients, 7 patients showed abnormal the direction of T wave vector. For a WPW syndrome patient, we measured the MCG signals before and after the surgery. and compared the difference. From the measured magnetic field distribution, current vector map was obtained to show the myocardium current activity. By comparing the MCG signals and current maps, we showed the differences in the analysis results between the healthy subjects and patients with heart diseases.

• 대한의용생체공학회:의공학회지
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• 제27권3호
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• pp.89-93
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• 2006

A simple algorithm that can be used to estimate a healthy person's blood pressure using pulse transit time is proposed in this paper. Fifty healthy students participated in the experiment that was conducted in line with the study. The subjects were asked to exercise on several exercise levels using a bicycle ergometer. Their blood pressures during the succeeding rest period were measured. A simple method was proposed to illustrate the relationship between blood pressure and pulse transit time. The systolic blood pressures as well as the heights and weights of the subjects were regarded as the proper parameters, and a second-order regression curve was produced to estimate the subjects' blood pressures. The mean error of estimation was less than 10 mmHg, which was the mean error of manual measurement. Although our estimation model is so simple, it can be used to estimate continuous blood pressure measurement for bicycle ergometer exercise. The electrocardiograms, photoplethysmograms, and blood pressures, however, could not be measured simultaneously As such, their estimation may be slightly different from the results taken from simultaneous measurements.

• Physical Therapy Rehabilitation Science
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• 제11권3호
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• pp.350-355
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• 2022

Objective: The purpose of this study is to find out whether people still have problems with breathing after being quarantined for a certain period after being infected with COVID-19. Design: Two-group pretest-posttest design. Methods: A total of 36 subjects were included in this study. Subjects who have been quarantined after being infected with COVID-19 (the after-quarantine group, n=18) and those who have never had COVID-19 (the healthy group, n=18). Respiratory function was evaluated by subjects in resting state and after treadmill exercise. Subjects performed treadmill exercise at moderate intensity for 20 minutes. To compare the differences in respiratory function between groups, forced vital capacity (FVC), forced expiratory volume in first second (FEV1), and maximum voluntary ventilation (MVV) were evaluated using a spirometer. Results: The result of the study, there was a significant difference in FVC in the after-quarantine group between resting and after treadmill exercise (p<0.05). In the healthy group, there was no significant difference in respiratory functions between resting and after treadmill exercise. Conclusions: The meaning of this result is that people who have been quarantined with COVID-19 have lower respiratory function than healthy people who are not infected with COVID-19.

• 한국보건간호학회지
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• 제26권1호
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• pp.82-90
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• 2012

Purpose: This study was conducted in order to compare muscle strength and gait ability of hemodialysis patients with those of healthy adults. Methods: Data were collected through a questionnaire, by testing of muscle strength and gait ability of 40 hemodialysis patients and 40 healthy adults. $X^2$-test, t-test, and ANCOVA were used in performance of data analysis. Results: First, variables including of occupation ( $X^2$=22.40,p<.001), body weight (t=-3.72, p<.001), and BMI ( $X^2$=14.65, p<.001) differed significantly between patients in the hemodialysis group and subjects in the healthy adult group. Second, using ANCOVA analysis with correction for related variables, such as occupation, body weight, and BMI as covariates, numbers for lift/reach (F=8.15, p<.001) and sit-to-stand (F=5.47, p=.001), and both maximum safe speed (F=9.17, p<.001) and normal comfortable speed (F=8.89, p<.001) were significantly lower for patients in the hemodialysis, compared with subjects in the healthy adult group. Conclusion: According to the results, muscle strength and gait ability of patients in the hemodialysis group were lower than those of subjects inthe healthy adult group. These findings suggest the importance and necessity for an interventional exercise and rehabilitation program for hemodialysis patients.

• 정신신체의학
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• 제14권2호
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• pp.102-107
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• 2006

연구목적 : 본 연구는 메스암페타민 의존자의 우울감 정도를 알아보고, 이들의 우울감이 메스암페타민 사용행태와 관련이 있는지 알아보기 위해 실시되었다. 방법: 메스암페타민 의존자 43명과 대조군 40명을 대상으로 메스암페타민 사용행태를 조사하였고, Beck 우울척도(Beck Depression Inventory, BDI)를 이용하여 우울감에 대해 알아보았다. 결과: 메스암페타민 군의 평균 BDI 점수는$14.1{\pm}7.7$점으로 대조군의 $7.3{\pm}5.7$점에 비해 유의하게 높았다(t=4.04, df=65, p<0.001). 의미있는 우울감을 호소하는 이의 비율도 대조군(경도-중등도 : 22.6%, 중등도-중증 : 3.2%)에 비해 메스암페타민 의존자(경도-중등도 : 38.9% : 중등도-중증 : 27.8%)에서 더욱 컸다(p=0.001). 성별, 연령, 음주량과 흡연량을 보정한 후에도 메스암페타민 의존자에서 우울감을 호소하는 이가 더 많았다. (OR=300.7, p=0.012). 메스암페타민 의존자의 BDI점수는 메스암페타민 단약기간과 유의한 음의 상관관계를 보였지만(r=-0.35, n=36, p=0.042), 메스암페타민 사용 용량이나 사용 기간과는 유의한 상관관계를 보이지 않았다(r=-0.08, n=36, p=0.677 ; r=-0.08, n=36, p=0.658). 결론: 메스암페타민 의존자는 대조군에 비해 우울감이 심하며 의미있는 우울감을 보고하는 경우도 더 흔하였다. 메스암페타민 의존자의 우울감은 메스암페타민 사용 정도와는 관련이 없었으나, 장기간의 단약을 통해 감소할 가능성이 시사되었다.

• 대한가정학회지
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• 제46권2호
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• pp.25-37
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• 2008

This study has investigated the perception of adults in relation to healthy family to help identify import issues. Gathered information were then incorporated to education programs for the Healthy Family Support Center. For this purpose, a survey was conducted in four cities in Kyungnam during March 2007. The responses of 213subjects have been used for the final analysis. The results of this analysis lead to three major findings. Firstly, the surveyed adults regarded positive interaction and domestic family functions as essential activities in healthy families. Secondly, the participants exhibited a very low knowledge-level of the 'Healthy Family Act', and the Healthy Family Support Center. Finally, the respondents said that they are more likely to specifically participate in educational program and counseling program if it helps them prevent family programs.