分离乳清蛋白对优秀田径运动员赛前训练阶段免疫和抗氧化机能的影响  

Effect of WPI on Immune Function and Antioxidant Capacity During Specific Training Period before Competition in Elite Track and Field Athletes

作　　者：李文华[1] 杨贤罡 

机构地区：[1]沈阳体育学院运动训练学院,沈阳10102 [2]河北省体育科学研究所,石家庄050011

出　　处：《河南师范大学学报（自然科学版）》2015年第3期172-177,共6页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家科技支撑计划(2009BAK57B04);河北省体育局体育科技研究项目(20131003;20121004);美国嘉力国际贸易有限公司横向合作项目(HBT1101205)

摘　　要：目的:观察WPI(分离乳清蛋白)对优秀男子中跑运动员赛前训练阶段免疫机能和抗氧化能力的影响.方法:17名优秀男子中跑运动员于赛前专项训练阶段,被随机分为对照组(C组,n=8)和服用组(E组,n=9).两组均正常饮食,其中E组额外补充服用WPI,方法为每天1次,补充22g,共4周.测试受试者在试验前、后血液中免疫功能和抗氧化功能相关指标的水平.结果:(1)试验后T淋巴细胞亚群CD4、白介素-4(IL-4)和干扰素γ(INF-γ)的蛋白水平E组均显著高于C组(P<0.05,P<0.05,P<0.05).(2)试验后超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)和谷胱甘肽-S转移酶(GST)的水平E组均显著高于C组(P<0.05,P<0.01,P<0.01),而丙二醛(MDA)的水平E组则显著低于C组(P<0.05).结论:(1)WPI可能通过辅助性T细胞亚群和双向调节Th1/Th2免疫平衡细胞因子激活运动员的免疫机能;(2)WPI能够明显提高运动员赛前训练阶段的抗氧化系统能力,主要通过增强抗氧化酶,尤其是谷胱甘肽相关酶的活性来减少自由基代谢产物的生成.Objective： To investigate the effect of WPI （whey protein isolate） on athletes immune function and antioxi- dant capacity during specific training period before competition. Method： During specific training period, seventeen elite male middle distance runners were randomly divided into experimental group （E, n= 9） and the control group （C, n= 8）. Except normal diet, athletes only in E group took WPI for 4 weeks with 22 g every time and once every day. Indicators of immune function and antioxidant capacity in blood were determined. Result： （1） In post-test, the levels of CD4, IL-4 and IFN-y in E group were all higher than those in C group （P0.05, P0.05, P0.05）. No significantly difference between two groups in other indicators was found. （2）In post-test, the levels of SOD, GST and GSH-Px in E group were higher than those in C group （P〈0.05, P〈0.01, P〈0. 01）, while MDA was lower （P〈 0.05）. Conclusion： （ 1 ） During specific training period before competition, WPI could obviously increase antioxidant capacity of athletes, mainly by enhancing the activity of antioxidase, es- pecially for glutathione-related enzymes, reduced the production of free radicals metabolites. （2）Also, WP1 might help to acti- vate immune function, by activation of helper T lymphocytes and regulation of cytokines involved in Thl/Th2 immune balance simultaneously.

关 键 词：分离乳清蛋白 免疫机能 抗氧化能力 

分 类 号：G804.7[文化科学—运动人体科学]