補充水果之維生素C與中高強度耐力訓練對運動員體內抗氧化狀況之影響

The Effect of Vitamin C Supplementation from Fruit and Endurance-Training on the Antioxidant Status of Athletes

鐘子雯(Tzu-Wen Chung) ； 陳福財(Fu-Tsai Chen) ； 劉珍芳(Jen-Fang Liu)

《中華民國營養學會雜誌》 25卷2期 (2000/06) Pp. 91-98

https://doi.org/10.6691/JCNS.200006_25(2).0003

摘要

長時間的耐力訓練或運動可能會給運動員帶來一些氧化壓力，本研究主要來探討抗氧化營養素的補充是否可以減少運動員體內因耐力訓練所帶來的氧化壓力。受試者選取自台北體育學院之運動年齡5年以上的男性游泳代表隊共20人，實驗期為大專運動會前的集訓期，受試者每天接受中高強度的耐力運動訓練，同時每天給予運動員含500 mg 維生素C的水果或果汁共計三週。結果顯示，補充水果之維生素C與接受中高強度耐力訓練之後，運動員血液中維生素C與SH group濃度均明顯地提昇了，全血中glutathione peroxidase與紅血球中superoxide dismutase之活性明顯降低，脂質過氧化產物 [TBARS (Thiobarbituric acid-reactive substances)與MDA + 4-HNE(malondialdehyde + 4-hydroxy-2(E)-nonenal)]仍有提高的現象;而運動員之creatine kinase (CK)及lactate dehydrogenase(LDH)活性則無顯著性的改變。由結果可知在中高強度耐力運動訓練之下，補充維生素C可以稍微提高運動員之抗氧化能力，但可能無法完全消除因運動訓練所帶來之氧化損傷。因此對處於長期耐力訓練或中高強度訓練期的運動員而言，維生素C或其他抗氧化劑的補充應有其必要性，只是補充量或補充的種類可能需隨不同的運動強度而作調整。

關鍵字

耐力訓練 ； 運動員 ； 水果 ； 維生素C ； 抗氧化力 ； 氧化壓力

並列摘要

This study was designed to investigate the effect of vitamin C supplementation and endurance-training on the antioxidant status of athletes. Subjects consisted of 20 males in a swimming varsity team. Fresh fruit containing 500 mg vitamin C was given to each athlete every day during a 3-week moderate/high-intense training period. The fasting venous blood was collected to measure the antioxidant parameters and muscle damage. The results showed that vitamin C and SH group levels were elevated, whole blood glutathione peroxidase and erythrocyte superoxide dismutase activities decreased after fruit vitamin C supplementation and endurance-training. However, the lipid peroxidation indicators-plasma thiobarbituric acid-reactive substances and malondialdehyde + 4-hydroxy-2(E)-nonenal were still high after fruit vitamin C supplementation and endurance-training. No significant changes in creatine kinase and lactate dehydrogenase were found. The results suggest supplementation of 500 mg vitamin C from fruits in athletes during moderate/high-intense endurance training can increase antioxidant status slightly, but can not compensate for the oxidative stress absolutely. This implies that supplementation of vitamin C from fruit is helpful to athletes under long term endurance-training, but the quantity and type of supplementation maybe require further clarification.

並列關鍵字

endurance-training athletes ； fruit ； vitamin C ； antioxidant status ； oxidative stress