비만 유·무에 따른 고강도 인터벌 운동과, 중강도 지속적 운동이 감정적 반응, 도파민 및 젖산염 농도에 미치는 영향

성동준(Sung, Dong-Jun),최재일(Choi, Jae-Il) 한국체육과학회 2020 한국체육과학회지 Vol.29 No.2

The purpose of this study was to investigate the difference of emotional response, dopamine and lactate concentrations in moderate-intensity continuous exercise(MICE) and high-intensity interval exercise(HIIE)) according to with or without obesity. The subjects of this study were 30 adult males in their 20s and were divided into obesity group (OG, n=15) and non-obesity group (NOG, n=15). Treadmill exercise was performed with MICE (warm up for 5 minutes at 50% VT, exercise for time to consume 150㎉ at 90% VT, cool down for 5 minutes a t 50% VT) and HIIE ( repeated 5 t imes for 2 minutes at 115% VT, active recovery was repeated 4 times for 2 minutes at 85% VT). The results of the statistical analysis are as follows. MICE showed no difference in feeling scale between OG and NOF, and in HIIE, the feeling scale of OG was significantly negative compared to the NOG. In addition, the OG was more negative than the NOG in the PACES after exercise. Dopamine expression showed that both groups increased significantly after 10 minutes of exercise compared to before exercise in MICE and HIIE. At the concentration of lactate, the OG was significantly higher at the end of exercise than the NOG at HIIE.

교양체육 수업이 대학생의 신체조성과 신체효율지수에 미치는 영향

성동준(Sung, Dong-Jun),임영태(Lim, Young-Tae),소위영(So, Wi-Young),이용식(Lee, Young-Sik),차광석(Cha, Kwang-Suk) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.2

The study examined the effect of participation in cultural physical education on the body composition and physical efficiency index in college students. 164 male and 89 female healthy students were participated in this lecture. The subjects were performed resistance training for 8 weeks. The results were analyzed by paired t-test using SPSS 12.0 program. In male subjects, LBM, muscle mass, % fat, WHR, and basal metabolic rate were significantly changed by resistance training. In female subjects, FBM, % fat and WHR were significantly decreased by resistance training. Also, PEI was enhanced via resistance training in male and female subjects. These results indicate that cultural physical education class in this study is very effective tool for controlling body composition and improving PEI in college students. Also, we suggest that participation of cultural physical education lead to improve health status and fitness level in college students.

L-carnitine 투여가 최대하 운동시 혈중 지질성분과 호흡교환율에 미치는 영향

성동준(Dong-Jun Sung),차광석(Kwang-Suk Cha) 한국생활환경학회 2007 한국생활환경학회지 Vol.14 No.3

The aim of this study was to investigate the effect of carnitine supplementation on blood lipid profiles and respiratory exchange ratio. Each subject performed maximal exercise testing on a treadmill and the exercise intensity was determined based on the testing. All subjects were orally ingested both placebo and carnitine (3.3 g) at an interval of 1 week. Carnitine treatment group showed a significant change in serum FFA and lipase compared to pre carnitine treatment group. However, other variables showed no differences. Also, the RER was reduced by an average 0.02 and it was notably reduced by 0.05 at 10 min after exercise. These results indicate that acute supplementation of L-carnitine had the effect on an increase of FFA and activation of lipase. But the supplementation of L-carnitine had no effect on the other lipid metabolic indices in the serum and glycogen sparing effect.

운동과 고혈압 : 운동에 의한 산화질소 생성과 혈관확장에 대한 종설

성동준(Dong-Jun Sung),소위영(Wi-Young So),박혜미(Hye-Mi Park),차광석(Kwang-Suk Cha) 한국생활환경학회 2010 한국생활환경학회지 Vol.17 No.2

Hypertension is an independent risk factor for coronary artery disease and associated with endothelial dysfunction. Endothelium-derived relaxation factors (EDRF) including nitric oxide (NO) are reduced bioavailability in hypertension and cause increased agonist-induced vasoconstriction. Recently studies, regular exercise has been shown to improve endothelium function via various mechanical change as a shear stress and cell signal transduction in hypertensive animal model and in patients with hypertension. In addition, hydrogen peroxide (H₂O₂) and adiponectin independently lead to vasodilation and increasing endothelium nitric oxide synthase. H₂O₂ activates K? channel either by direct regulation of the channels or increase of endothelial nitric oxide synthease (eNOS). Hypodiponectinemia is associated with impaired endothelium-dependent vasodilation, which indicate reduced vasodilation. This review summarizes the current information on the improvement of NO bioavailability by regular exercise in hypertensive animal models and hypertensive patient.

남자 초등학생의 PEI 수준에 따른 신체조성과 일부 체력요인의 차이

성동준(Sung Dong Jun),임강우(Lim Kang Woo),소위영(So Wi-Youn),이용식(Lee Young Sik),차광석(Cha Kwang Suk) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.4

The aim of this study of the physical efficiency index (PEI) of elementary school boys is to provide baseline data to be applied in the school physical education field by finding out the factors that can predict PEI based on differences in physical fitness, body composition, and physique. The subjects were classified into three groups by their PEI level. First, muscle mass and body composition had no relevance with PEI level. In addition, all factors [body mass index (BMI), % body fat, total body fat, weight, and height] had a tendency to be lower as the PEI level increased. Chest circumference, however, was larger as the PEI level increased. Second, flexibility had no relation with PEI level, and muscle endurance and muscle power had a tendency to increase with the PEI level. Third, muscle endurance, muscle power, BMI, weight, and chest circumference, making up 26.7% of PEI were analyzed and the regression equation to predict PEI is as follows: PEI = 62.775 + 0.047 × (muscle endurance) + 0.097 × (muscle power) - 0.210 × (BMI) - 0.204 × (height) + 0.089 × (weight) + 0.204 × (chest size). These results indicated that PEI is closely related with physical fitness, body composition, and level of physique. Moreover, high PEI levels is more effectively contribute to improving cardiorespiratory fitness, ideal of body composition and the development of physical fitness in elementary school students.

고령 여성 노인의 골밀도 수준에 따른 체력 성장호르몬 에스트로겐 및 건강관련 변인의 비교

성동준(Sung, Dong-Jun),이용식(Lee, Yong-Sik),차광석(Cha, Kwang-Suk) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.6

The aim of this study was to investigate the comparative analysis of physical fitness, growth hormone, estrogen and health-related factors according to bone mineral density(BMD) in elderly women with over 70 years. 136 elderly women were assigned into the normal group(n=14), osteopenia group(n=30), and osteoporosis group(n=92). We tested physical fitness faactors including strength, endurance, flexibility, agility. We also measured growth hormone, estrogen and health-related factors. The difference of factors among the three groups, correlation, and multiple regression was analyzed using spss 19.0. The results of this study were as follows: first, height, body mass index, and endurance were significantly different among the three groups. Second, growth hormone, estrogne, and health-related factors were not significantly difference among the three groups. Third, positive correlations between BMD and other factors were observed including height, weight, BMI, growht hormone and HDL-C. Fourth, HDL-C, lower body strength, upper body strength, growht hormone and waist circumference, making up 49.1% of BMD were analyzed.

FeO/Fe(Ⅱ) 시스템에서 TCE의 제거 특성

성동준(Sung Dong Jun),이윤모(Lee Yun Mo),최원호(Choi Won Ho),박주양(Park Joo Yang) 대한토목학회 2008 대한토목학회논문집 B Vol.28 No.1B

철의 환원 특성에 관한 연구는 이미 널리 수행되었으며 특히 미네랄과 2가철의 반응 메커니즘은 2가철의 흡착이나 바운드를 통해 Fe(Ⅱ)-Fe(Ⅲ) (hydr)oxides를 생성하여 2가철이 3가철로 산화됨으로써 물질을 환원시키는 것으로 받아들여지고 있다. 그러나 2가철로 개질된 재강슬래그를 이용한 DS/S 실험과정에서 이러한 메커니즘으로 설명하기 힘든 현상을 발견하였다. 재강슬래그의 주요 성분중의 하나인 FeO와 Fe(Ⅱ)만을 이용하여 TCE의 분해과정을 실험해 본 결과 초기 TCE의 분해가 이루어지지 않다가 급속히 분해되는 현상을 보였으며 이러한 시스템에서 TCE의 분해는 예상치 못한 결과였다. FeO/Fe(Ⅱ) 시스템은 3가철이 존재하지 않기 때문에 기존의 Fe(Ⅱ)-Fe(Ⅲ) (hydr)oxides를 형성하는 환원 메커니즘으로는 설명할 수 없었다. 따라서 본 연구에서는 TCE의 분해실험과 분해 부산물의 측정, 2가철과 3가철을 확인함으로써 FeO/Fe(Ⅱ) 시스템의 환원특성을 확인해 보고자 하였다. 실험 결과 2가철이 FeO에 홉착 또는 바운드 되는 것을 확인 할 수 는 있었으나 기존의 메커니즘으로 설명하기에는 부족한 부분이 있었다. 분해부산물들을 통해 환원으로 인한 TCE의 분해는 의심의 여지가 없었으나 FeO/Fe(Ⅱ) 시스템이 새로운 species를 형성하는지 , 혹은 FeO에 Fe(Ⅱ)가 흡착 또는 바운드 되어 이제껏 알려지지 않은 형태의 새로운 미네랄 상을 형성하는지는 좀 더 상세한 연구가 필요하다. The reaction between iron oxide and ferrous iron is known to be the adsorption of ferrous iron onto the oxide surfaces that produces Fe(Ⅱ)-Fe(Ⅲ) (hydr)oxides and ferrous oxide oxidized to ferric ion which is the reducing agent of the target compounds. In our investigations on DS/S using ferrous modified steel slag, the results did not follow the trends. FeO and Fe(Ⅱ), the major component of steel slag, were used to investigate the degradation of TCE. Degradation did not take place for the first and suddenly degraded after awhile. Degradation of TCE in this system was unexpected because Fe(Ⅱ)-Fe(Ⅲ) (hydr)oxides could not be produced in absence of ferric oxide. In this study, the characteristics of FeO/Fe(Ⅱ) system as a reducing agent were observed through the degradation of TCE, measuring byproducts of TCE and the concentration of Fe(Ⅱ) and Fe(Ⅲ). Adsorption of ferrous ion on FeO was observed and the generation of byproducts of TCE showed the degradation of TCE by reduction in the system is obvious. However it did not correspond with the typical reducing mechanisms. Future research on this system needs to be continued to find out whether new species are generated or any unknown mineral oxides are produced in the system that acted in the degradation of TCE.

Inhibition of Various K⁺ Current by Ofloxacin in Neonatal rat Ventricular Myocytes

Park Sang Woong(박상웅),Oh Seung Bum(오승범),Gu Jaewoong(구재웅),Sung Dong Jun(성동준) 한국웰니스학회 2018 한국웰니스학회지 Vol.13 No.3

플루오로 퀴놀론은 광범위하게 사용되는 항생제 중 하나이다. Ofloxacin은 상대적으로 안전하다고 여겨지지만 심장에 부작용이 있는지 여부는 불분명하다. 이 파일럿 연구는 ofloxacin이 L-typeCa<SUP>2+</SUP> 채널 전류뿐만 아니라 다양한 K⁺ 채널 전류에 미치는 영향을 연구했다. 다양한 K⁺ 전류는 다단계 펄스를 사용하는 전압 펄스 프로토콜로 검사되었으며, 단계 -120mV에서 +50mV까지의 탈분극 단계,-80mV의 유지력에서 -40mV까지 진행되었다.L-typeCa<SUP>2+</SUP> 전류는 prepulse후 -40mV에서 0mV에서 측정되었다. Ofloxacin은 IKir의 경우 850μM, IK의 경우 6.8μM 및 IKr의 경우 0.4μM의 IC50값으로 다양한 K⁺ 전류를 억제하였다. 그러나 Ofloxacin은 L-typeCa<SUP>2+</SUP> 전류에 영향을 미치지 않았다. 이 결과를 통해 잠재적인 심장 부작용, 예를 들어 활동 전위의 연장과 부정맥이 ofloxacin에 의해 유발 될 수 있다고 제안한다. Fluoroquinolones are among the most widely used broad-spectrum antibiotics. Although ofloxacin is deemed to be relatively safe, whether side effects occur in the heart is unclear. This pilot study investigated the effect of ofloxacin on various K+ channel currents as well as L-type Ca2+ channel currents. The various K+ currents were examined with a voltage pulse protocol using multi-step pulses, with a step to-120mV followed by a depolarizing step to +50mV and then to–40mV from holding potential of-80mV. L-type Ca2+ currents were measured at 0mV after prepulse to-40mV. Ofloxacin inhibited the various K+ currents, with IC50 values of 850μM for IKir, 6.8μM for IKs, and 0.4μM for IKr. Ofloxacin did not affect the L-type Ca2+ currents. We suggest that potential cardiac side effects, such as action potential prolongation and arrhythmia, maybe induced by ofloxacin.

대학생의 건강관련 체력 향상을 위한 교양체육 수업의 효용성

고성식(Ko, Sung-Sik),성동준(Sung, Dong Jun) 한국웰니스학회 2015 한국웰니스학회지 Vol.10 No.4

이 연구는 교양체육 수업을 수강하는 대학생을 대상으로 운동프로그램 참여 후 건강관련 체력에 미치는 영향을 규명하는데 목적이 있다. 이 연구의 대상자들은 남학생 18명과 여학생 27명을 대상으로 하였으며, 주 3회의 유산소 및 저항성 운동프로그램을실시하였다. 이 연구의 결과, 남학생(p=.004)과 여학생(p<.001)의 심폐지구력은 운동 후 유의한 증가가 나타났다. 그리고 남학생에서 우악력(p=.004)과 근지구력(p<.001), 그리고 유연성(p=.014)의 유의한 증가가 나타났으며, 여학생은 좌악력(p<.001), 우악력(p=.001), 근지구력(p=.002) 그리고 유연성(p=.002)에 유의한 증가를 관찰하였다. 신체조성의 경우 남학생은 체지방량(p=.014)만 유의한 감소가나타났다. 반면, 여학생은 체지방량(p=.005)과 체지방율(p=.004)이 유의하게 감소되었다. 이와 같은 결과는 주3회의 운동프로그램참여 형태로 운영된 교양체육수업이 대학생의 건강관련 체력향상에 뒤따르는 건강증진을 위한 수단으로서 긍정적인 효과를 유도할 수 있다는 것을 의미한다. The purpose of this study was to investigate the effects of participation in cultural physical education on the health-related physical fitness components in college students. Eighteen male and twenty-seven female healthy students were participated in this lecture. Subjects were performed aerobic- and resistance exercise for 14 weeks with 3 times/weeks. In the results, cardiorespiratory fitness was significantly increased in both male(p=.004) and female (p<.001). In male students, the right grip strength(p=.004), muscular endurance (p<.001) and flexibility (p=.014) was significantly enhanced after exercise of this lecture.. The left grip strength (p<.001), right grip strength (p=.001), muscular endurance (p=.002) and flexibility (p=.002) in female students was also significantly increased. In body composition of male students, only fat mass was significantly decreased (p=.014). Concerning body composition of female students after participation of the this lecture, significant differences in fat mass(p=.005) and % body fat (p=.004) was evident after exercise. These results indicate that the cultural physical education classes three times a week exercise program run by forms of participation can lead to positive effects for improved health-related physical fitness and subsequently health promotion in college students.

광물 촉매에 의한 Fenton 산화 공정을 이용한 phenanthrene 분해에서 음이온 계면활성제의 역할

최영무(Choi Young Mu),성동준(Sung Dong Jun),김정환(Kim Jung Hwan),박주양(Park Joo Yang) 대한토목학회 2006 대한토목학회 학술대회 Vol.2006 No.10