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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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The relationship between exercise intensity, oxidative stress and antioxidant status has been studied in sixteen trained male athletes aged 20-25years. Subjects performed 30 - 40minutes of treadmill running at 65% of VO<sub>2</sub> max(moderate intensity exercise) ，followed by 5 minutes of running at 85% of VO<sub>2</sub> max(high intensity exercise). Blood samples were taken before and immediately after two exercise bouts for measurement of blood antioxidants, indices of lipid peroxidation and susceptibility of crythrocyte to peroxidation. Plasma concentrations of cholesterol(7.3%), vitamin C(7.5%) and uric acid(2.1%) were elevated a little after exercise at 65% of VO<sub>2</sub> max, and raised further after exercise at 85% of VO<sub>2</sub> max. Plasma TBARS concentrations after both exercises at 65% of VO<sub>2</sub> max(10.4%) and 85% of VO<sub>2</sub> max(13.7%) were significantly higher than before exercise(p <0 .05). However，these exercise-induced changes could be partly due to significant decreases in plasma volume which occurred after both exercise bouts(p < 0.05). Plasma volume decreased 5.85 ± 2.06% and 11.25±2.87% with exercise at 65% and 85% of VO<sub>2</sub> max, respectively. The erythrocyte susceptibility to peroxidation after exercise at 65% of VO<sub>2</sub>max was unchanged compared with the value before exercise, whereas after exercise at 85% of VO<sub>2</sub> max, it was significantly higher than after exercise at 65% of VO<sub>2</sub> max as well as before exercise(p < 0.05). A significant increase in erythrocyte α-tocopherol was observed with exercise at 85% of VO<sub>2</sub> max (29 .10 ±4.76㎍/g Hb) when compared with the level before exercise(24.61 ± 3.45㎍/g Hb)(p < 0.05). The results suggest that exercise induced changes in plasma levels of Iipid peroxide and antioxidant need to be evaluated，taking the shift in plasma volume into consideration. Also, exercise at high intensity corresponding to 85% of VO<sub>2</sub>, max alters the erythrocyte antioxidant status in relation to exercise-induced increases of oxidative stress. (Korean J Nutrition 32(8) : 870~876, 1999)
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