著者

長島 未央子 齋藤 和人 萩 裕美子

出版者

特定非営利活動法人 日本栄養改善学会

雑誌

栄養学雑誌 (ISSN:00215147)

巻号頁・発行日

vol.67, no.3, pp.107-111, 2009 (Released:2011-05-26)

参考文献数

18

被引用文献数

1

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We investigated the effect of kurozu, a brewed vinegar, on the NK cell activity and peripheral blood cells in 18 university student cyclists. They were assigned to two groups, one of 11 drinking kurozu, and the other of 7 cyclists not drinking it. The drinking group was given 30 ml of kurozu a day for 80 days. Both groups performed an equal amount of training for 80 days. The NK cell activity was significantly decreased by 80 days of training in the non-drinking group (from 71.9 ± 15.9% to 61.9 ± 11.3%) (p < 0.05), but not in the drinking group. Kurozu therefore prevent the degradation of NK cell activity by intense training, suggesting its contribution to the physical condition of student bicycle racers.

著者

長島 未央子

出版者

一般社団法人日本体力医学会

雑誌

体力科学 (ISSN:0039906X)

巻号頁・発行日

vol.60, no.3, pp.279-286, 2011 (Released:2011-07-12)

参考文献数

26

被引用文献数

1 3

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Relation between oxidative stress and antioxidant status during long-lasted endurance exercise at moderate intensity is not clear. The purpose of the study was to examine changes of oxidative stress and antioxidant status during 3 hours endurance exercise at intensity of 70% heart rate reserve (70%HRR) in well-trained cyclists. Eight college cyclists participated in this study after giving the informed consent. They performed a steady-state exercise that corresponded to HR of approximately 145 bpm for 3 hours on a cycle ergometer in a laboratory. Blood samples were taken at 5 time points: before exercise (Pre), at 1 hour (Ex 1h), 2 hours (Ex 2h), 3 hours (Ex 3h) during exercise and 1 hour after exercise ( Post 1h), to analyze the oxidative stress, the antioxidant status, plasma vitamin C (VC) and vitamin E (VE) concentrations. The oxidative stress and antioxidant status were determined by using the FRAS4 analyzer. The oxidative stress (d-ROM) did not change during and after exercise. However, the antioxidant status (BAP) and the plasma VC concentration were significantly higher in Ex 1h, Ex 2h, Ex 3h and Post 1h compared with Pre. On the other hand, no changes were found in the plasma VE concentration during and after exercise. In conclusion, endurance exercise for 3 hours at the intensity of 70%HRR increased the plasma antioxidant level, and this increase may contribute to inhibit exercise-induced oxidative stress in well-trained cyclists. We suggest that regular endurance training might improve the antioxidant status in trained athletes.