两种能量饮料对男性运动员最大心肺适能及血乳酸水平选定指标的有效性。
The effectiveness of two energy drinks on selected indices of maximal cardiorespiratory fitness and blood lactate levels in male athletes.
作者信息
Rahnama Nader, Gaeini Abbas Ali, Kazemi Fahimeh
机构信息
Associate Professor, Faculty of Physical Education and Sport Sciences, University of Isfahan, Isfahan, Iran.
出版信息
J Res Med Sci. 2010 May;15(3):127-32.
BACKGROUND
Consumption of energy drinks has become widespread among athletes. The effectiveness of Red Bull and Hype energy drinks on selected indices of maximal cardiorespiratory fitness and blood lactate levels in male athletes was examined in this study.
METHODS
TEN MALE STUDENT ATHLETES (AGE: 22.4 ± 2.1 years, height: 180.8 ± 7.7 cm, weight: 74.2 ± 8.5 kg) performed three randomized maximal oxygen consumption tests on a treadmill. Each test was separated by four days and participants were asked to ingest Red Bull, Hype or placebo drinks 40 minutes before the exercise bout. The VO (2max), time to exhaustion, heart rate and lactate were measured to determine if the caffeine-based beverages influence performance. ANOVA test was used for analyzing data.
RESULTS
A greater value was observed in VO (2max)and time to exhaustion for the Red Bull and Hype trial compared to the placebo trial (p < 0.05). No significant difference was found in pre-and post-test heart rate for two drinks (p > 0.05). For blood lactate levels no significant changes were observed before and two minute after the test (p > 0.05).
CONCLUSIONS
Ingestion of Red Bull and Hype prior to exercise testing is effective on some indices of cardiorespiratory fitness but not on the blood lactate levels.
背景
能量饮料在运动员中已广泛消费。本研究考察了红牛和亢奋能量饮料对男性运动员最大心肺适能和血乳酸水平特定指标的影响。
方法
10名男性学生运动员（年龄：22.4±2.1岁，身高：180.8±7.7厘米，体重：74.2±8.5千克）在跑步机上进行了三次随机的最大摄氧量测试。每次测试间隔四天，要求参与者在运动前40分钟饮用红牛、亢奋或安慰剂饮料。测量最大摄氧量、力竭时间、心率和乳酸水平，以确定含咖啡因饮料是否影响运动表现。采用方差分析测试分析数据。
结果
与安慰剂试验相比，红牛和亢奋试验的最大摄氧量和力竭时间值更高（p<0.05）。两种饮料测试前后的心率无显著差异（p>0.05）。测试前和测试后两分钟血乳酸水平无显著变化（p>0.05）。
结论
运动测试前饮用红牛和亢奋对心肺适能的某些指标有效，但对血乳酸水平无效。
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