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首页> 外文期刊>Journal of the International Society of Sports Nutrition >Effects of acute caffeine, theanine and tyrosine supplementation on mental and physical performance in athletes
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Effects of acute caffeine, theanine and tyrosine supplementation on mental and physical performance in athletes

机译：急性咖啡因，Theanine和酪氨酸对运动员心理和身体表现的影响

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BACKGROUND:A limited amount of research has demonstrated beneficial effects of caffeine and theanine supplementation for enhancement of mental performance. The purpose of this investigation was to determine whether the acute ingestion of a supplement containing caffeine, theanine and tyrosine improves mental and physical performance in athletes.METHODS:Twenty current or former male collegiate athletes (age: 20.5?±?1.4 y; height: 1.82?±?0.08?m; weight: 83.9?±?12.6?kg; body fat: 13.8?±?5.6%) completed this randomized, double-blind, placebo-controlled crossover trial. After familiarization, each participant completed two identical testing sessions with provision of a proprietary dietary supplement (SUP) containing caffeine theanine and tyrosine or a placebo (PL). Within each testing session, participants completed assessments of mental and physical performance before and after provision of SUP or PL, as well as after two rounds of exercise. Assessments were performed using a performance testing device (Makoto Arena) that evaluated multiple aspects of mental and physical performance in response to auditory and visual stimuli. Testing was performed both with the body in a static position and during dynamic movement. General linear models were used to evaluate the effects of SUP and PL on performance.RESULTS:Changes in movement accuracy during performance assessment were greater following SUP ingestion as compared to PL for both static and dynamic testing (SUP: +?0.4 to 7.5%; PL: -?1.4 to 1.4% on average; p??0.05). For dynamic testing, the change in number of targets hit was higher and the change in average hit time was lower with SUP as compared to PL (p??0.05).DISCUSSION:The present results indicate that a combination of a low-dose of caffeine with theanine and tyrosine may improve athletes' movement accuracy surrounding bouts of exhaustive exercise without altering subjective variables. Based on this finding, supplementation with caffeine, theanine and tyrosine could potentially hold ergogenic value for athletes in sports requiring rapid and accurate movements.TRIAL REGISTRATION:NCT03019523. Registered 24 January 2017.
机译：背景：有限的研究已经证明了咖啡因和茶园补充的有益作用，以提高心理表现。该调查的目的是判断含有咖啡因，茶木和酪氨酸的补充剂的急性摄取是否会提高运动员的心理和身体表现。方法：二十个流或前男性大学运动员（年龄：20.5？±±1.4 y;高度： 1.82？±0.08？m;重量：83.9？±12.6？kg;体脂肪：13.8？±5.6％）完成了这种随机，双盲，安慰剂控制的交叉试验。熟悉后，每个参与者完成了两种相同的测试会话，提供了含有咖啡因Themine和酪氨酸或安慰剂（PL）的专有膳食补充剂（Sup）。在每个测试会议内，参与者在提供SUP或PL之前和之后完成了对精神和身体表现的评估，以及两轮运动后。使用性能测试设备（Makoto Arena）进行评估，该性能测试设备（Makoto Arena）在响应听觉和视觉刺激的情况下评估精神和物理性能的多个方面。在静态位置和动态运动期间，在身体和动态运动中进行测试。通用线性模型用于评估SUP和PL对性能的影响。结果：与PL相比，对于静态和动态测试（SUP：+ 0.4至7.5％，PL相比，性能评估期间的运动精度的变化更大。 PL： - ？平均值1.4至1.4％; p？<？0.05）。对于动态测试，目标命中数量的变化更高，与PL相比，SUP的平均来的变化较低（P ?? 0.05）。频道：目前的结果表明，低剂量的组合咖啡因与Theanine和Tyrosine可能会改善运动员的运动精度，周围的围绕令人遗憾的运动，而不改变主观变量。基于该发现，用咖啡因，茶碱和酪氨酸的补充可能会对需要快速准确的运动的运动员占运动员的心性发育价值。关于注册：NCT03019523。注册2017年1月24日。

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