Correlation between Endoscopic Severity of Gastroesophageal Reflux Disease (GERD) and Indexes of Obesity / 가정의학회지

BACKGROUND: There are many reports that obesity could be associated with gastoesophageal reflux disease (GERD) but the outcomes are controversial and the studies on correlation between endoscopic severity of GERD and obesity are rare. Therefore, we investigated the association between endoscopic severity of GERD and indexes of obesity. METHODS: Among the subjects who visited a health promotion center of a general hospital from January 2007 to March 2008, a total of 527 subjects with typical symptoms of GERD who underwent esophagogastroduodenoscopy and analysis of body composition were enrolled. The endoscopic severity of GERD was classified depending on LA grading classification system. RESULTS: Among 527 subjects, 125 subjects were classified with Non-erosive reflux disease (NERD) while 254, 105, and 43 subjects were classified as LA grade A, B, and C group, respectively. Men and frequent alcohol drinkers (> or = 5 times/week) were likely to be in higher endoscopic severity group (OR, 2.065 and 2.394, respectively; P or = 5 times/week).

A Comparison of the Resting Energy Expenditure of Korean Adults Using Indirect Calorimetry / 대한지역사회영양학회지

The purpose of this study was to provide baseline data for revising the recommended energy intake for Korean adults. We recruited 290 adults so as to determine their resting energy expenditure (REE) and energy intake. The REE was measured by indirect calorimetry. We also calculated the REE from prediction equations formulated by World Health Organization (WHO). The energy intake for two consecutive days was assessed using the 24 hour recall method. The body weight, lean body mass (LBM) and percentage body fat were measured using the INBODY 3.0 system. We compared the results of three age groups; 20 to 29 years, 30 to 49 years and 50 years or more. The average energy intake of each age group was below the 7th Korean Recommended Dietary Allowances (RDA). The average energy intake was lower in the older age groups. However, no difference was observed among the age groups when the energy intake as a percentage of the Korean RDA was compared. Our measurement of the REE was higher than the REE calculated by the WHO's method. Correlation coefficients between the measured and the calculated values of REE for all age groups showed significant correlations (r = 0.475-0.672). As the ages of all the subjects increased, the REE/kg of body weight decreased. There were no significant differences in the REE / kg of the LBM between the different age groups; however, the REE/kg of the LBM was higher in the female group than in the male group. Negative correlations of the REE with the age (r = -0.242) and body fat ratio (r = -0.313) were observed; positive correlations of the REE with the BMI (r = 0.265), height (r = 0.570), weight (r = 0.562) and LBM (r = 0.586) were also found (p < 0.01).

A Study on High School Girls' Body Development and Body Fat / 체질인류학회지

The purpose of this study is to compare the relationship between physical characteristics and % body fat, using the data from senior students at a girl's high school in 1993 (three years ago) and in 1996. The subjects of this study were high school girls in Seoul and were composed of 274 persons in 1993 and 284 in 1996. Their heights, weights and % body fat were measured. The results are as follows : Analyses of t-test revealed that there was a significant difference in height between two groups (p<.001), the mean value of height in 1996 being taller (2.26cm) than that in 1993. However, that of weight between two groups were almost identical. Although the mean value of two groups were similar, examination of the data showed that the maximum value of weight was quite different between the two groups (maximum value in 1993 being 92kg, as compared to 75.5kg in 1996). Also, the comparison of % body fat showed that the mean value in 1996 was larger than that in 1993 (23.66 vs. 22.59, p<.001). In summary, the results of this study suggest that we are not necessarily faced with the state to worry about side-effect by excessive fat accumulation as a result of high school girls' high calory intake. These results may be obtained by several kind of social causes but we must consider the student's stress of S.A.T, increase of class at school, and increasing energy consumption (decrease of S.D).

The Effect of Long-term Aerobic Training on the Body Fat Reduction for High School Girls / 체질인류학회지

The purpose of this study was to investigate the effect of aerobic training on body fat reduction. A total of 978 high school girls participated in this study (freshmen = 365 ; junior = 300 ; senior = 313). Within each grade, subjects who showed interest in physical exercise were selected and assigned into athletes group (20 for freshmen, 22 for junior, 29 for senior). The athletes group performed aerobic exercise for 100 minutes per day, 5 days a week with 70% of a subject's maximal heart rate. Each subject agreed to participate in this study when she was freshman. Thus, the length of exercise was dependent upon subject grade. That is, senior group was on the exercise program for two and half years, junior group for one and half years, and freshman group for six months. The results are as follows : 1. The mean value of % body fat for athletes group were 21.23 for freshman, 21.57 for junior, and 21.49 for senior. These values were a bit smaller when compared to those for non-athletes groups (26.32, 24.76, 23.65 for freshman, junior and senior, respectively). The comparison of % body fat between athletes and non-athletes group showed that the largest difference was showed in freshman group, followed by junior and senior groups. 2. For the athletes groups there was no significant difference in the mean value of % body fat between 3 grades. However, this was not the case for the non-athletes groups. There was a significant difference (p<001) among the 3 grades for the non-athletes groups, the freshman group being the largest, followed by junior and senior.