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대학 축구선수의 무산소성 예비량과 무산소성 운동능력의 상관성
정진원(Jin Won Jeong),심대용(Dae Yong Sim) 한국운동영양학회 2000 Physical Activity and Nutrition (Phys Act Nutr) Vol.4 No.1
N/A This study employed 11 university soccer players for assessing anaerobic capacities related to ATP-PC and/or lactate system. It was investigated correlation among anaerobic capacities from Critical Power test, from Wingate test, and from Isokinetic test. Also, the study investigated regression formula which could expect anaerobic reserve(AR) from variables measured in Wingate and Isokinetic test. There were significant but intermediate correlation between AR and WIN5, (r= .62, P< .05) and WIN30(r= .64, P< .05). There was no statistically significant but intermediate correlation between AR and WIN10 (r= .52, P> .05). The study used stepwise method for multiple regression by Wingate variables to produce AR. The result showed that WIN30 had significant effect and indicated regression formula (Y= 1.3323(WIN30)-14737.758) to explain 41.2% variation of AR. Stepwise method was done for multiple regression on Isokinetic variables to produce AR`s inferred possibility by extensors TW of 60˚ /sec as regression (Y= 10.6737 (TW)+2083.9403) explained 42.9% variation of AR. In the correlation between measured variables of Wingate and Isokinetic extensors there was no significance of intermediate correlation in 60˚ /sec PT and WIN5(r= .53, P> .05) and in TW and WIN5(r= .56 P< .05) statistically. Also, There was significance of intermediate correlation in PT and WIN10 (r= .65, P< .05), no significance in TW and WIN10 (r= .57, P> .05), in PT and WIN30(r= .58), and no significance in TW and WIN30(r= .46, P> .05). In the correlation between measured variables of Wingate and Isokinetic extensors, there was significance of intermediate correlation in 180˚ /sec PT and WIN10 (r= .69, P< .05) and significant correlation in Isokintic 180˚ /sec PT and WIN30(r= .65, P< .05). The data suggested that anaerobic reserve assess true anaerobic ability not including the energy component of anaerobic glycolyses. Also, the study provides preliminary data on the anaerobic abilities in university soccer players as assessed by the Critical Power test, Wingate test, and Isokinetic test.
건강한 성인 남자에서 비타민 B6와 folate가 혈중 호모시스테인 수치와 내피세포 의존 혈관 확장능에 미치는 효과
진동규,이승진,신원용 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2
Background) Elevation in plasma homocysteine has been widely studied as an independent risk factor for atherosclerosis. And epidemiologic studies have demonstrated that the persons who take the folate and vitamin B6 have lower incidence of atherosclerotic vascular disease and lower plasma homocysteine level. But, not yet the effects of vitamin B6 and folate on the level of plasma homocysteine and brachial artery dilation on healthy subjects was not evaluated. Methosd) We evaluated the effects of 50 mg of vitamin B6 and 1 mg of folate on endothelial function, plasma homocysteine levels to twenty-five men in a randomized, double-blind, placebo-controlled, crossover design. Results) In our study, supplement of vitamin B6 and folate significantly lowered plasma homocysteine level (placebo:folate=6.56±1.55μmol/L vs. 5.37±1.04μmol/L, p=0.001). But, there were no statistically significant increament of flow-mediated dilation (FMD) compared to placebo (placebo;folate = 5.12±3.26% vs. 6.69±2.60%, p=0.070) and there were no significant correlation between the improvement of homocysteine level and increament of flow mrdiated dilation on healthy subjects. Conclusion) Compared to persons with absolute or relative hyper- -homocysteinemia, our study did not show such favorable effects in healthy persons. So further studies must to be held to discover the effect of folate and vitamine B6 in healthy persons.
Failure Cost와 Life Cycle Cost를 고려한 연속시스템에 대한 최적 장치 선택에 관한 연구
진상화,김용하,송희열,여영구,김인원 한국안전학회 2004 한국안전학회지 Vol.19 No.4
In this study, the required life cycle cost is evaluated in consideration of the equipment's availability during its life cycle. In order to meet the maximum availability required by the process, the failure cost and life cycle cost is assessed, The optimal equipment selection method is presented according to the analysis of the failure cost and life cycle cost. For the systems in which equipments are connected serially, the optimal equipments are selected by minimizing the life cycle cost and satisfying the required system availability goal. In addition, the selection methods and life cycle cost are analyzed according to the cost variation of the equipment. By using the life cycle evaluation procedure, the failure cost and maintenance cost needed during the life cycle of the equipment can be presented.