중학생들의 인터넷 중독 위험수준에 따른 신체활동량과 비만도의 관련성

정민기(Jeong, Min-Ki),김권민(Kim, Gwon-Min),권유찬(Kwon, Yoo-Chan) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.4

The purpose of this study was to examine the association perceived physical activity pattern and body mass index according to habitual internet usage among middle school student. Data were analyzed for 969 students who responded to self-reported base cross-sectional survey relating to socio-demographic variables, internet usage status, and a short version of the international physical activity questionnaire. Prevalence rate of physical activity status showed that 53.5% at 150 min/week under, 46.5% at 150min/week over. Prevalence rate of internet usage showed that 95.6% at normal group, 2.6% at potential group, 1,9% at addiction group. Prevalence rate of body mass index status of over weight according to internet usage status shoed that 83.1% at normal, 5.1% at potential, 11.9% at addiction. Prevalence rate of physical activity levels of 150 min/week under according to internet usage status showed that 93.8% at normal, 3.5% at potential, 2.7% at addiction. In comparison with the physical activity levels was significantly more likely potential internet usage (OR, 2.62; 95% confidence interval [95%CI], 1.09-6.47; p〈.05) and addiction usage (OR, 3.82; 95% confidence interval [95%CI], 1.24-11.75; p〈.05). The results revealed that physical activity levels and body mass index correlates of internet usage status. This finding suggest the necessity of developing specific strategies for physical activity intervention by internet addiction among middle school students.

스마트폰 사용정도가 수면의 질과 좌식행동에 미치는 영향

김권민(Kim, Gwon-Min),정민기(Jeong, Min-Ki),권유찬(Kwon, Yoo-Chan) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.1

The purpose of this study was to examine the association perceived physical activity pattern and body mass index according to habitual internet usage among middle school student. Data were analyzed for 969 students who responded to self-reported base cross-sectional survey relating to socio-demographic variables, internet usage status, and a short version of the international physical activity questionnaire. Prevalence rate of physical activity status showed that 53.5% at 150 min/week under, 46.5% at 150min/week over. Prevalence rate of internet usage showed that 95.6% at normal group, 2.6% at potential group, 1.9% at addiction group. Prevalence rate of body mass index status of over weight according to internet usage status showed that 83.1% at normal, 5.1% at potential, 11.9% at addiction. Prevalence rate of physical activity levels of 150 min/week under according to internet usage status showed that 93.8% at normal, 3.5% at potential, 2.7% at addiction. In comparison with the physical activity levels was significantly more likely potential internet usage (OR, 2.62; 95% confidence interval [95%CI], 1.09-6.47; p<.05) and addiction usage (OR, 3.82; 95% confidence interval [95%CI], 1.24-11.75; p<.05). The results revealed that physical activity levels and body mass index correlates of internet usage status. This finding suggest the necessity of developing specific strategies for physical activity intervention by internet addiction among middle school students.

스마트폰 과의존 비만 여대생의 태권도 프로그램 참여가 대사증후군 지표와 수면의 질에 미치는 영향

정민기(Jeong, Min-Ki) 한국체육과학회 2020 한국체육과학회지 Vol.29 No.4

The present study is aimed at investigating the effects of 12 weeks Taekwondo program participation on metabolic syndrome indicators and sleep quality in obesity female university student dependent on smart phones. Sixteen participants were assigned in Taekwondo group(n=8), and control group(n=8). The Taekwondo program consisted of program 60min/session, 3 days each week for 12 weeks. The results of this study were as follow. First, in body composition, weight(p<.001), lean body mass(p<.01), percent body fat(p<.05), and body mass index(p<.001) had a statistically significant. Second, in metabolic syndrome indicators, waist circumference(p<.001), high density lipoprotein cholesterol(p<.01), triglyceride (p<.01), fasting blood glucose(p<.01), systolic blood pressure(p<.05), and diastolic blood pressure(p<.01) had a statistically significant. Third, smartphone addiction level and sleep quality, smartphone addiction level score(p<.001), and sleep quality score(p<.001) had a statistically significant. Also, smartphone addiction level and waist circunference(r=.844 p<.001) and sleep quality(r=.639, p<.01) presented a positive correlation. In conclusion, these findings suggest that Taekwondo program participation may represent an effective intervention strategy for improving metabolic syndrome indicators and smart phone dependent and sleep quality in obesity female university student dependent on smart phones.

실버태권도 프로그램이 제2형 당뇨병 비만 고령여성의 자립생활체력과 우울 및 당뇨 인자에 미치는 영향

정민기(Jeong, Min-Ki),정현훈(Jung, Hyun-Hun) 한국체육과학회 2020 한국체육과학회지 Vol.29 No.1

The purpose of this study was to investigate the effects of silver Taekwondo program on self-reliance physical fitness, depressive symptoms and diabetes factor in obese elderly women with type 2 diabetes. Eighteen obese elderly women with type 2 diabetes were assigned in silver Taekwondo group (n=9), and control group (n=9). The silver Taekwondo program consisted of program 60min/session, 3 days each week for 16 weeks. The results of this study were as follow: 1. In body composition and self-reliance physical fitness, body weight(F=9.931, p<.01), % fat (F=10.256, p<.01), body mass index(F=9.689, p<.01), lean body mass(F=18.296, p<.01), muscle mass(F=38.741, p<.001), 2-minute step(F=21.684, p<.001), back scratch(F=10.893, p<.01), chair sit and reach(F=24.474, p<.001), arm curl(F=34.087, p<.001), and chair stand(F=42.557, p<.001) had a statistically significant. 2. In depressive symptoms and diabetes factor, CES-D(F=64.692, p<.001), insulin(F=16.945, p<.01), fasting blood glucose(F=30.858, p<.001), HbA1c(F=10.055, p<.01), triglyceride(F=17.593, p<.01), and total cholesterol(F=8.885, p<.01) had a statistically significant. These findings suggest that silver Taekwondo program may represent an effective intervention strategy for improving self-reliance physical fitness and depressive symptoms and diabetes factor in obese elderly women with type 2 diabetes.

장기간의 태권체조와 세라밴드 운동이 비만고령여성의 자립생활체력 및 hs-CRP 농도에 미치는 영향

정민기(Jeong, Min-Ki),박현태(Park, Hyun-Tae),박상갑(Park, Sang-Kab),김은희(Kim, Eun-Hee),권유찬(Kwon, Yoo-Chan) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.3

The purpose of this study was to investigate the effects of 24-week Takwondo aerobic and Thera-band on self-reliance physical fitness and hs-CRP concentration in obese elderly women. We recruited 20 elderly women with obese : a exercise group (n=10) and control group(n =10). The frequency of exercise for the group was 3 times per week (i.e., Monday, Wednesday, and Friday) for 24 weeks. Each 60-minute exercise programme included 10 minutes of warm-up activities and 5 minutes of cool-down activities. The results of this study showed that combined exercise improves body composition after 24 weeks. Self-reliance physical fitness was significantly increase than baseline values in the combined exercise group. The risk factor of Cardiovascular disease were significantly increase than baseline values in the combined exercise group. Our findings demonstration that a 24-week combined exercise programme may be an effective intervention strategy for improving body composition, self-reliance and risk factor of cardiovascular disease in obese elderly women.

태권도 수련이 비만 여아의 신체구성과 체력 및 성조숙증 위험인자에 미치는 영향

정민기 ( Min Ki Jeong ),권유찬 ( Yoo Chan Kwon ),박상갑 ( Sang Kab Park ),김은희 ( Eun Hee Kim ),박종환 ( Jong Hwan Park ) 대한무도학회 2014 대한무도학회지 Vol.16 No.1

이 연구의 목적은 비만 여아를 대상으로 12주간의 태권도 수련을 통해 신체구성과 체력 및 성조숙증과 밀접한 관련이 있는 위험인자에 미치는 영향을 분석하여 건강증진과 성조숙증의 예방을 위한 태권도 수련의 효과를 제시하는 데 있다. BMI 백분위수 95 이상이면서 Tanner stage 1에 해당되는 7~8세의 비만 여아를 대상으로 신체구성과 혈압을 측정하였으며, 체력측정은 2007 국민체력실태조사(문화체육관광부, 2008)의 기준에 따라 실시하였다. 그리고 자전거에르고미터를 이용하여 최대산소섭취량을 측정하였고, 프로그램 실시 전과 12주 후 혈액분석을 실시하였다. 또한 태권도 수련을 1회 60분, 주 3회, 12주간 실시하여 신체구성과 체력 및 성조숙증 위험인자에 미치는 영향에 대하여다음과 같은 결과를 얻었다. 태권도 수련군에서 신장이 유의하게 증가하였으며 체질량지수, 체지방률이 유의하게 감소한 것으로 나타나 신체구성의 개선에 긍정적인 효과가 나타났으며 체력에서도악력, 앉아 윗몸 앞으로 굽히기, 사이드스텝, 눈감고 외발서기, 최대산소섭취량, 체중당 최대산소섭취량이 유의하게 개선되어 비만 여아의 체력수준이 높아진 것으로 나타났다. 또한 혈중 지질 및 성조숙증 위험인자의 변화에서는 leptin, TG, TC, LDL-C에서 그룹과 시기 간의 상호작용에서 유의한 차이가 나타났다. 이상의 결과를 종합하여 볼 때 비만 여아에 있어서 12주간의 태권도 수련은 신체조성과 체력의 개선 및 혈중 지질에 긍정적인 영향을 주어 비만으로 인해 발생될 수 있는 각종 생활습관병의 예방에 긍정적인 영향을 줄 뿐만 아니라, 성조숙증과 밀접한 관련이 있는 위험인자의 개선에도 긍정적인 영향을 줄 수 있는 운동방법이라 생각된다. The purpose of this study was to investigate the effects of Taekwondo training on body composition, physical fitness and precocious puberty risk factors in infantile obesity girls. Subjects consisted of over BMI 95 percentile and applicable Tanner stage 1 and obesity symptom 7-8 years girls. Taekwondo training program consisted of 60 minutes, 3 times a week for 12 weeks. The results of this study were in body composition, body weight(p<.05), body mass index(p<.01) and percent body fat(p<.001) had a statistically significant after Taekwondo program. In physical fitness, grip strength(p<.05), trunk flexion in sitting position(p<.05), side step(p<.001), close eye one leg standing(p<.05) and V.O2max(p<.05) had a statistically significant after Taekwondo program. In precocious puberty risk factors and serum lipids, leptin(p<.01), triglyceride(p<.05), total cholesterol(p<.05) and LDL cholesterol(p<.001) had a statistically significant after Taekwondo program. Therefore, the results of this study demonstrated that Taekwondo program may be an effective intervention strategy for improving body composition, physical fitness, blood lipids and precocious puberty risk factors, leading to improved lifestyle-related diseases prevention in obese girls.

TPA 기법을 이용한 건물 내 설비 동하중 산정

정민기(Jeong, Min-Ki),이성수(Lee, Seong-Soo),김용구(Kim, Yong-Ku),안상경(Ahn, Sang-Kyung),이상엽(Lee, Sang-Yeop) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.8

The facility equipments generate dynamic force on building floor and the force can be measured with force transducer. However, this method depends on the measuring capacity or range of sensor, or mounts installation condition of equipments. Because of this restricting condition on force measuring system, this paper suggests a indirect method, the TPA(transfer path analysis) method, that produces a closely approximate dynamic force of equipments. This method calculates the dynamic force by using transfer response function. Firstly, the calculated dynamic force of impact load and continuous load was respectively compared with the sensor-measured value to examine the accuracy of TPA method. After that, the dynamic force and response induced by large facility equipments - a cooling tower, AHU and a large ventilator - were calculated by TPA method and the validity of these value were examined.

장기간 복합운동이 내장지방형 중년남성의 체력 및 중심동요에 미치는 영향

정민기(Jeong, Min-ki),박상갑(Park, Sang-Kab),김은희(Kim, Eun-Hee),박종환(Park, Jong-Hwan),권유찬(Kwon, Yoo-Chan) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.6

The purpose of this study was to investigate the effects of 32-week combined exercise on physical fitness and center of pressure in middle-age men with visceral obesity. We recruited 24 middle-aged men (age range, 40 - 50 years) with visceral obesity: a combined group (n=12) and control group (n=12). Visceral fat was defined as an abdominal visceral-to-subcutaneous fat. The frequency of exercise for the combined (i.e., yoga, resistance, aerobic, and balance exercises) group was 3 times per week (i.e., Monday, Wednesday, and Friday) for 32 weeks. Each 60-minute exercise programme included 10minutes of warm-up activities and 10 minutes of cool-down activities. The results of this study showed that combined exercise improves body composition, subcutaneous fat and visceral fat after 32 weeks. Physical fitness was significantly increase than baseline values in the combined group. Anteroposterior range of center of pressure and mediolateral range of center of pressure were significantly decrease than baseline values in combined group after 32 weeks. Our findings demonstrate that a 32-week combined exercise programme such as yoga, resistance, aerobic, and balance may be an effective intervention strategy for improving abdominal fat, physical fitness and center of pressure leading to improved quality of life in middle-aged men with visceral obesity.

고령 여성의 태권도 수련과 신체활동에 따른 신체 기능과 우울감의 관련성

정민기(Jeong, Min-Ki),김권민(Kim, Gwon-Min) 한국체육과학회 2021 한국체육과학회지 Vol.30 No.6

The purpose of this study was to the difference in physical function and depression by groups of lower moderate to vigorous physical activities(MVPA), Higher MVPA, Taekwondo. Data were analyzed for 36 old adults who could to cross-sectional study participation to physical function and depression. The results of physical function and depression for taekwondo group was shown to be positive for Five chair sit to stand(p=.010), Sit and reach(p=.000), Open eyes one leg stand(p=.000), Two minute step(p=.006), MVPA(p=.000), center for epidemiologic studies depression scale(CES-D) (p=.014) than for lower MVPA and higher MVPA groups. In conclusion, the health-related importance of a lot of physical activity in elderly women is increasingly apparent. In addition, Taekwondo might be an admirable way to supersede a lot of physical activity.

대학생들의 주별 신체활동량에 따른 건강관련 체력 및 우울 수준의 관계

정민기(Jeong, Min-Ki),김권민(Kim, Gwon-Min),권유찬(Kwon, Yoo-Chan) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.4

The purpose of this study was to examine the association perceived health-related physical fitness and depressive levels according to weekly physical activity pattern among university students. Data were analyzed for 132 students who responded to self-reported base cross-sectional survey relating to socio-demographic variables, depressive assessment, short version of the IPAQ and a health-related physical fitness test. Prevalence rate of CES-D score of 21 more than according to weekly physical activity status showed that 73.9% at IAG, 26.1% at SAG. Prevalence rate of 20m shuttle run of average or over according to weekly physical activity status showed that 41.6% at IAG, 58.4% at SAG. In comparison with the cardiorespiratory endurance was significantly less likely SAG (multi-adjust model: OR, 0.22; 95% confidence interval [95% CI], 0.90-0.53; p<.05). In comparison with the depressive levels was significantly more likely SAG (multi-adjust model: OR, 3.68; 95% confidence interval [95% CI], 1.10-12.26; p<.05). The results revealed that health-related physical fitness and depressive levels correlates of weekly physical activity pattern. This finding suggest the necessity of developing specific strategies for physical activity intervention by health-related physical fitness and depressive among university students.