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10주간의 줄넘기 운동 프로그램이 초등학생의 기초체력, 혈중 지질 및 운동 습관에 미치는 영향
한태경(Tae Kyung Han),이형록(Hyung Rock Lee) 한국체육측정평가학회 2014 한국체육측정평가학회지 Vol.16 No.2
본 연구는 초등학생들의 줄넘기 운동 프로그램 참여에 따른 기초체력, 혈중지질, 운동습관에 미치는 변화를 비교·분석하고자 하였다. 총 322명의 초등학생을 대상으로 주 3회, 10주간 줄넘기 운동 프로그램을 실시하였으며, 최대심박 수의 45~65%로 시작하여 점진적으로 65~75%, 그리고 75~85%까지 운동강도를 점진적으로 증가시켰으며, 운동 프로 그램 이외의 생활은 평소와 동일하게 지내도록 하였다. 프로그램 참여에 따른 변화는 기초체력(심폐체력, 유연성, 근 력, 순발력), 혈액변인(총콜레스테롤, 중성지방, 저밀도 콜레스테롤, 고밀도 콜레스테롤), 그리고 생활습관(주당 운동 횟 수, TV나 컴퓨터 이용시간, 평균 운동시간 등)을 조사하였다. 프로그램 참여 전과 후에 따른 변화는 반복측정 이원변 량분석을 실시하였으며, 운동습관 변화에 대한 집단 간 전후의 변수의 차이는 교차분석을 실시하였다. 결과적으로 10 주간의 줄넘기 운동 프로그램 참여는 심폐체력의 기초체력 향상과 총 콜레스테롤, 중성지방, 그리고 저밀도지단백 콜 레스테롤의 유의한 개선 효과가 있었으며, 운동습관의 개선효과는 나타나지 않았다. 따라서 초등학생들의 줄넘기 운동 프로그램은 초등학생들의 건강한 생활을 위한 효과적인 운동프로그램으로 도움이 될 수 있을 것으로 판단된다. The purpose of this study was to determine the assessment of rope-skipping exercise training for the basal physical fitness, blood lipid profiles and exercise habits in elementary school children. The subjects were 322 children of the fifth to sixth grades of elementary school. Exercise group performed the combined rope-jumping training for 60 minutes/time, 3 days/week and 1st : 45~65%, 2nd : 65~75%, 3rd : 75~85% HRmax intensity for 10 weeks, whereas control group were asked to maintain normal lifestyle during the same period. Measuring materials were basal physical fitness(cardiorespiratory endurance, flexibility, muscular strength, and agility); blood lipid profiles(total cholesterol [TC], triglyceride [TG], low density lipoprotein cholesterol [LDL-C], and high density lipoprotein cholesterol [HDL-C]); and exercise habits (activity days per week, time using TV and computer, average exercise time per day, etc). The results showed positive changes in basal physical fitness(cardiorespiratory endurance, flexibility, muscular strength, and agility) and blood lipid profiles(TC, TG, and LDL-C) following 10 weeks of rope-skipping exercise training. However, all-life habits had not changed. These results suggest that rope-skipping exercise training may be effective for helping elementary school children.
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Dimethylformamide가 Mouse 肝細胞의 微細構造에 미치는 影響
이형록,정호삼,이규식 한양대학교 의과대학 1985 한양의대 학술지 Vol.5 No.2
Dimethylformamide (DMF) has been widely used in the synthetic textile industry as an organic solvent. However, it is known that DMF irritates to skin and mucous membranes and causes several toxic symptoms when dermal and respiratory exposure to DMF is prolonged. It is supposed that DMF provoked toxic reaction in the liver during the metabolic process of the DMF-injected experimental animal. Therefore, the authors observed changes cytoplasmic organelles of the hepatic parenchymal cells in order to demonstrate the effect of DMF on the mouse liver. Healthy male mice of ICR strain were used in this experiment and the weight of the experimental animals were around 20gm. The animals of the experimental group were administered DMF diluted in the water for injection, by intraperitoneal injection in a dose of 1.5ml per kg of body weight in a volume of 0.2ml. The animals of the control group were amdinistered only water for injection. The experimental animals were killed at intervals of 6, 12, 24 and 48 hours after administration of DMF, respectively. Liver specimens of 1mm³ size were prefixed in the 2% glutaraldehyde-2.5% paraformaldehyde phosphate buffer solution (pH 7.2) and post-fixed in the 1% osmic acid. After specimens were dehydrated and embedded in the epon 812, ultrathin sections(600-800A°thickness) were made and double stained with uranyl acetate and lead citrate. These preparations were observed with JEM 100B electron microscope. The results obtained were as follows: 1. Cisternae of rough endoplasmic reticulum were intensely dilatated and fragmented partly. 2. Smooth endoplasmic reticulum was markedly proliferated and glycogen particles were markedly decreased or depleted. 3. The atrophies of the Golgi complex were found. 4. Primary lysosomes and secondary lysosomes-residual bodies, autophagic vacuole and multivesicular bodies were increased in number. 5. Numerous lipid droplets of irregular size were produced. Consequently, it is concluded that DMF would induce the degenerative changes in cytoplasmic organelles of the hepatic parenchymal cell in the mouse.
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