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首页> 外文期刊>The British Journal of Nutrition >Breakfast high in whey protein or carbohydrates improves coping with workload in healthy subjects.
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Breakfast high in whey protein or carbohydrates improves coping with workload in healthy subjects.

机译：富含乳清蛋白或碳水化合物的早餐可以改善健康受试者的工作量。

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Dietary components may affect brain function and influence behaviour by inducing the synthesis of neurotransmitters. The aim of the present study was to examine the influence of consumption of a whey protein-containing breakfast drink v. a carbohydrate drink v. control on subjective and physiological responses to mental workload in simulated work. In a randomised cross-over design, ten healthy subjects (seven women, median age 26 years, median BMI 23 kg/m2) participated in a single-blinded, placebo-controlled study. The subjects performed demanding work-like tasks after having a breakfast drink high in protein (HP) or high in carbohydrate (HC) or a control drink on separate sessions. Subjective states were assessed using the NASA Task Load Index (NASA-TLX), the Karolinska sleepiness scale (KSS) and the modified Profile of Mood States. Heart rate was recorded during task performance. The ratio of plasma tryptophan (Trp) to the sum of the other large neutral amino acids (LNAA) and salivary cortisol were also analysed. The plasma Trp:LNAA ratio was 30% higher after the test drinks HP (median 0.13 ( micro mol/l)/( micro mol/l)) and HC (median 0.13 ( micro mol/l)/( micro mol/l)) than after the control drink (median 0.10 ( micro mol/l)/( micro mol/l)). The increase in heart rate was smaller after the HP (median 2.7 beats/min) and HC (median 1.9 beats/min) drinks when compared with the control drink (median 7.2 beats/min) during task performance. Subjective sleepiness was reduced more after the HC drink (median KSS - 1.5) than after the control drink (median KSS - 0.5). There were no significant differences between the breakfast types in the NASA-TLX index, cortisol levels or task performance. We conclude that a breakfast drink high in whey protein or carbohydrates may improve coping with mental tasks in healthy subjects.
机译：饮食成分可能会通过诱导神经递质的合成而影响大脑功能并影响行为。本研究的目的是检验食用含乳清蛋白的早餐饮料诉碳水化合物饮料诉控制权对模拟工作中对精神工作量的主观和生理反应的影响。在随机交叉设计中，十名健康受试者（七名女性，中位年龄26岁，中位BMI为23 kg / m 2 ）参加了单盲，安慰剂对照研究。受试者在单独的会议上喝了高蛋白（HP）或高碳水化合物（HC）的早餐饮料或对照饮料后，执行了艰巨的工作任务。主观状态使用NASA任务负荷指数（NASA-TLX），卡罗林斯卡困倦量表（KSS）和修改后的情绪状态档案进行评估。在执行任务期间记录心率。还分析了血浆色氨酸（Trp）与其他大中性氨基酸（LNAA）和唾液皮质醇之和的比率。试饮HP（中位数0.13（micro mol / l）/（micro mol / l））和HC（中位数0.13（micro mol / l）/（micro mol / l）之后，血浆Trp：LNAA比高出30％ ）比对照饮料服用后的中位数（中位数0.10（micro mol / l）/（micro mol / l））。在任务执行期间，与对照饮料（中值7.2次/分钟）相比，HP（中值2.7次/分钟）和HC（中值1.9次/分钟）饮料后的心率增加较小。 HC饮料（中位数KSS-1.5）后，主观嗜睡减少得比对照组饮料后（中位数KSS-0.5）多。 NASA-TLX指数中的早餐类型，皮质醇水平或任务绩效之间无显着差异。我们得出的结论是，早餐饮料中富含乳清蛋白或碳水化合物可以改善健康受试者的应对心理任务。

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