• Journal of the Korean Society of School Health
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• v.33 no.3
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• pp.203-212
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• 2020

Purpose: The purpose of this study was to investigate the relationship between relative handgrip strength (HGS/BMI) and obesity (BMI above 95th percentile) in adolescents. Methods: The subjects of the study were 637 out of 701 adolescents aged 10~18 who participated in the 2018 National Health and Nutrition Survey (KNHANES), excluding those with missing values in body mass index (BMI) and handgrip strength (HGS). The relative handgrip strength (HGS/BMI) value was divided by quartile and composite sample logistic regression analysis was performed to see its relationship with obesity (BMI above 95th percentile). The collected data were analyzed using SPSS 18.0. Results: As a result of analyzing HGS according to gender-specific quartiles, age, height, and weight of male adolescents increased significantly as HGS/BMI increased (p trend<.001). In addition, as HGS/BMI increased, total cholesterol, triglycerides, and HDL cholesterol decreased significantly (p trend<.001). In the case of female adolescents, age and height increased significantly as HGS/BMI increased (p trend<.001). HGS/BMI was lower in the obese group (p=.023), while total cholesterol was higher in the obese group(BMI above 95th percentile) than in the non-obese group. As a result of the composite sample logistic regression analysis, the odds ratio (OR) decreased significantly as the quartile increased in both male and female adolescents. Conclusion: According to these results, a follow-up study is needed to confirm the factors affecting muscle strength of adolescents. In addition, this study intends to be used as basic data to conduct further research and to develop programs that can improve muscle strength and reduce obesity in adolescents.

• Korean Journal of Human Ecology
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• v.17 no.1
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• pp.159-170
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• 2008

This study was carried out for the prevalence of metabolic syndrome in obese middle school students. The subjects were 104 obese adolescents of 4 middle schools in Namwon city, Jeonbuk. Average age of the subjects was 12.2 years old, BMI of mild obesity group, moderate obesity group and severe obesity group were 24.6kg/m2, 27.5kg/m2, and 31.8 kg/m2, respectively. Prevalence of metabolic syndrome in obese students was 2.9%. And the person who has more than 2 out of 5 symptoms was 22.1%, and more than 1 was 39.4%. The prevalence of each symptoms were abdomen obesity(46.2%), hyper triglyceride(23.1%), high blood pressure(20.2%), high HDLcholesterol(2.9%), but the hyper glycemia had not been found. Nutrient intakes of 3 groups were not significantly different, energy was 1817.9kcal, carbohydrate was 265.7g, protein was 72.2g, and fat was 51.9g. Nutrient adequacy ratio(NAR) of protein, phosphorus, iron, vitamin A, vitamin B1, vitamin B1, niacin, vitamin C was proper, except calcium. Seventy point two percent of the obese students knew 'obesity is a disease', and 49.0% of the subjects didn't know the complication of the obesity. Only 27.9% of the obese adolescents took nutrition education class, but 51.9% of them thought nutrition education was necessary. We suggest that the nation enforce the policy for early detection and treatment of obesity for adolescents. Obese students and their parents should take nutrition education.

• Research in Community and Public Health Nursing
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• v.19 no.4
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• pp.587-599
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• 2008

Purpose: The purpose of this study is to compare the differences between obese and non-obese students in sedentary leisure-time activities. Methods: The survey was performed with 725 students from 3 different middle schools in Kyeonggi-do. In order to measure the degree of obesity. used are BMI and "2007 Korea Children and Adolescents' Average Scale". With regard to the leisure activities. YRBS and "youth Behavior Risk Factor Surveillance" were referred. Results: The rate of boys' overweight was 18.0% and that of girls was 11.8%. Students watching TV 3hours+/day were 16.6% for boys and 30.6% for girls during weekday. Respective values for weekend were 56.8% and 71.4%. Students using computer 3hours+/day were both 14.5% for boys and girls during weekday. and 53.7% for boys and 36.7% for girls during weekend. 14.9% of boys and 21.2% of girls didn't participate in vigorous physical activities and 5.9% for boys and 11.2% for girls didn't participate in moderate physical activities. The differences between obese and non-obese students in sedentary activities were not significant. However. the difference in leisure-time activity was significant. Conclusion: The programs for prevention and management of adolescents' obesity have to be focused on reducing their sedentary activities and improving physical activities.

• Child Health Nursing Research
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• v.23 no.1
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• pp.117-125
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• 2017

Purpose: Little is known about the dieting experiences of obese adolescent boys, as the majority of studies on obesity in children and adolescents have included only girls. This qualitative study was designed to explore the ways in which male middle school boys attach subjective meanings to their obese bodies, and experience dieting practices in their everyday lives. Methods: Fifteen obese boys aged 14 to 16 were interviewed via in-depth, face-to-face interviews. All interview data were audiotaped, transcribed, and analyzed using thematic analysis. Results: Having a large build and increased strength that prevented bullying by peers had positive meanings participants attributed to their obese bodies. However, negative meanings existed as well, including feeling heavy and having no physical endurance, having a clammy and odorous body, and being bullied and vulnerable to disease. With respect to dieting experiences, multiple positive and negative subthemes were identified. Conclusion: The findings of this study show the intersection between adolescence and everyday life challenges for obese middle school boys in the Korean culture. Further, recommendations for healthcare professionals include a gender-specific approaches when intervening and planning programs for obese adolescents.

• Korean Journal of Health Education and Promotion
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• v.18 no.3
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• pp.117-131
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• 2001

This study was attempted to develope a highly reliable and valid tool which is useful to assess the Korean obese adolescents' stress and coping method. The data were collected from the total of 600 obese students from middle and high schools in Pusan. The author used a convenience sampling method. The data collection was done from March 2 to July 11, 1999. The analysis of the data was done with SPSS Win(10.0) for descriptive statistics and factor analysis. The preliminary tool was composed of 72 items(stress items: 34, coping method items: 38) with the five point Likert scale. Item analysis and inter consistency were calculated for reliability and validity through pre-test. The preliminary tool was analyzed for reliability and validity. Finally, the tool was of 65 items(stress items: 33, coping method items: 32). The results were as follows: 1. Cronbach Coefficient Alpha for the 33 items of stress was .9485 and the 32 items of coping method was .8534. 2. The factor analysis was done in order to confirm construction and the items were extracted Oblimin rotation and Maximum likelihood extraction method. 3. The factor analysis showed 6 factors in stress and 10 factors in coping method. These 6 factors of stress explained 62.4％ and 10 factors of coping method explained 57.4％. 4. Six factor of stress lable were 〈outward appearance〉, 〈boyfriend/ girlfriend〉, 〈occur an outbreak of disease〉, 〈mutual relation of family〉, 〈an obese figure〉, 〈be a burden on exercise〉. 5. Ten factor of coping method lable were 〈be concerned about another affairs〉, 〈recreation activities〉, 〈self-violence〉, 〈relaxation〉, 〈hobby activities〉, 〈avoid a situation〉, 〈communication〉, 〈music〉, 〈negative behavior〉, 〈positive thinking〉. The results of using this scale in a study will contribute to design an appropriate school health management of obese students, and also it will contribute to the development of nursing research.

• Clinical and Experimental Pediatrics
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• v.52 no.10
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• pp.1109-1118
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• 2009

Purpose : Metabolic syndrome (MS), characterized by obesity and insulin resistance, elicits risk factors such as hyperlipidemia, hypertension, and glucose intolerance with additive effects on atherosclerosis, leading to cardiovascular diseases. The purposes of this study were to evaluate the prevalence of MS among overweight and obese adolescents and to investigate the impact of obesity on the cardiovascular system. Methods : In all, 684 adolescents were included in the study. Blood pressure, body mass index (BMI), fasting blood glucose, total cholesterol, triglyceride, low-density-lipoprotein (LDL)-cholesterol, high-density-lipoprotein (HDL)-cholesterol, aspartate aminotransferase (AST), alanine aminotransferase (ALT), and high-sensitive C-reactive protein (hs-CRP) were measured in the patients with a BMI of >85 percentile. Brachial-ankle pulse wave velocity (BaPWV) and ankle brachial index were measured using Vascular Profiler (VP)-1000. Results : MS was confirmed in 19.5% of the overweight and obese adolescents and 50.8% of the obese adolescents. The systolic and diastolic blood pressure, height, weight, fat mass, %fat, BMI, obesity index, and waist circumference were higher in the overweight and obese adolescents with MS. Moreover, the triglyceride, AST, ALT, and hs-CRP levels were higher, whereas HDL-cholesterol level was significantly lower in this group. The overweight and obese adolescents with MS showed shorter diastolic and systolic times, higher heart rate and BaPWV, and longer E-wave deceleration time by echocardiography. Conclusion : Overweight and obese adolescents showed characteristic MS features such as hypertension and hyperlipidemia. Thus, obese adolescents predisposed to MS should be provided early treatment for obesity.

• Korean Journal of Health Education and Promotion
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• v.22 no.1
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• pp.103-115
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• 2005

The Purpose of this study was to identify the process of change, decisional balance and self-efficacy corresponding to the stages of change in exercise behavior based on the Transtheoretical Model(TTM) in obese adolescents. A random sample of 517 obese adolescents was recruited in Pusan. The data were collected from June 15 to 30, 2004. The research instruments were Stages of Change for Exercise Behavior, Process of Change, Decisional Balance, and Self-Efficacy. The data were analyzed by descriptive statistics and ANOVA using SPSS WIN 10.0 program. The results of this study were as follows 1. The subjects were distributed in each stage of exercise behavior: There were 255 subjects($49.3\%$) in the contemplation stage, 131 subjects($25.3\%$) in the preparation stage, 52 subjects($10.1\%$) in the maintenance stage, 41 subjects($7.9\%$) in the action stage, and 38 subjects($7.4\%$) in the precontemplation stage. 2. Analysis of variance showed that cognitive process (F=13.57, p=.000), behavioral process(F=17.23, p=.000), decisional balance pros(F=11.95, p=.000), and self efficacy(F=12.52, p=.000) were significantly associated with the stages of exercise behavior change, but decisional balance cons(F=2.87, p=.023) was not significantly associated with the stages of exercise behavior change. This study can provide useful information for developing effective exercise behavior program considering obese adolescents' stages of change according t'.t the TTM.

• Clinical and Experimental Pediatrics
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• v.48 no.10
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• pp.1076-1081
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• 2005

Purpose : Insulin resistance is the most important risk factor linked to the development of impaired glucose tolerance(IGT), diabetes mellitus and cardiovascular diseases in childhood and adolescent obesity, The purpose of this study was to see whether insulin resistance of obese adolescent is higher than that of obese children. and to analyze gender difference and affecting factors of insulin resistance. Methods : Of the 9,837 school children from 5 to 16 tears old, 92 obese children and 187 adolescent, underwent a two-hour oral glucose tolerance test and plasma glucose, insulin, lipid profiles, leptin and high sensitive C-reactive protein(hs-CRP) were measure. Results : Plasma insulin levels of female were higher compared to those of males during oral glucose tolerance test(P<0.05). Four(4.3%) in obese children and twenty five(13.3%) in obese adolescents met the criteria of IGT. Female, leptin, adiponectin and triglyceride concentrations were strongly correlated with homeostatic model assessment insulin-resistance(HOMA-IR) by multiple linear regression analysis(P<0.05). Conclusion : Obese adolescents might have higher insulin concentrations compared to obese children and obese girls higher insulin concentrations than obese boys. Obese boys and children with impaired glucose tolerance have higher insulin concentrations than those with normal glucose tolerance. HOMA-IR was significantly correlated with female, plasma leptin, adiponectin and triglyceride concentrations.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.17 no.1
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• pp.3-9
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• 2006

Objectives: Obesity is one of risk factors for psychological and social adjustment problems (depression, low self esteem, low school function etc). Quality of life(QOL) is comprehensive and multidimensional construct including physical, emotional, social and school functioning. Some authors reported that child and adolescent obesity is associated with impaired QOL. This study was to examine the association between QOL and body mass index (BMI) in middle school students. Methods : Cross sectional analysis of 471 adolescents between the ages of 13 and 14 years ($mean{\pm}SD,\;13.4{\pm}0.6$), who attended one of middle schools in Seoul, Korea. Participants' QOL were scored by using Korean version of pediatric QOL inventory generic score scale ($PedsQL^{TM}$ 4.0). Participants had a $mean{\pm}SD\;BMI\;of\;21.3{\pm}4.0$. Self reports and parent proxy reports using $PedsQL^{TM}$ 4.0 were administered to measure participant's QOL. Participants were divided into four groups by BMI (Male: obesity group >26.5, at risk group 23.2-26.5, normal weight group 15.8-23.1, underweight group <15.8, Female : obesity group >25.2, at risk group 22.9-25.2, normal weight group 16.0-22.8, underweight group <16.0). Results : Compared with other groups, obese adolescents reported significantly(p<0.01) love. QOL in all domains. Obese adolescents were more likely to have impaired QOL than normal weight adolescents (Odds Ratio, 8.3, 95% confidence interval, 4.0-16.7). Conclusion : Obese adolescents have lower QOL than normal weight adolescents. Psychiatrist, parents, and teachers need to be informed of the risk fur impaired QOL in obese adolescents to target interventions that could enhance health outcomes.

• Journal of the Korean Society of Food Culture
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• v.13 no.4
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• pp.383-391
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• 1998

This study was conducted to find the effect of in-class nutrition education and exercise program for obese adolescent boys in Taegu with the nutrition knowledge test before and after education program and anthropometric measurement. The subjects were consisted of a normal group (NG; n= 13) and an obese group (n=30). The obese group is divided into two groups; obese group A (OG-A; n=12), participated in a ten-week nutrition education only; and obese group B (OG-B; n=28), participated in a ten-week nutrition education and exercise program. The anthropometric data of the three groups were increased after the nutrition education program. However the obesity index(BMI, R hrer, WHR, Skinfold thickness) of OG-B were significantly decreased after the programs. The nutrition intake data were also changed after the nutrition education program. Especially the intake of carbohydrate was significantly decreased in OG-B from $421.5{\pm}155.9g$ to $349.0{\pm}41.0g$ (p<0.05) after the nutrition education program. It was noted that the intake of Ca was significantly decreased in all three groups after the nutrition education program. The mean score of the nutrition knowledge test also significantly increased from $13.7{\pm}3.1$ to $17.8{\pm}3.0$ after the nutrition education program. The result strongly suggested that nutrition education program should be successful if the obese adolescents and their parents especially mothers participated in the same class. In summary, nutrition education and exercise programs were effective on reducing obesity of obese adolescents. Nutrition knowledge of obese adolescent was significantly increased after nutrition education program.