Minimal Influence of Formulated Nutritional Interventions on Sleep and Next-Morning Physical Performance, Cognitive Function, and Postural Sway in Adult Males: A Randomized, Placebo-Controlled, Crossover Study.

IF 3 3区 医学 Q2 NUTRITION & DIETETICS
Matthew Morrison, Jonathon Weakley, Gregory D Roach, Charli Sargent, Dean J Miller, Lara Nyman, Carissa Gardiner, Gabriella Munteanu, Matthew D Pahnke, Shona L Halson
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Abstract

Athletes often experience poor sleep quality and quantity which may hinder physical performance and cognitive function. Presleep nutritional strategies may be an alternative to pharmacological interventions to improve sleep. The aim of this study was to examine the effect of two different doses of a nutritional intervention (both containing high Glycemic Index carbohydrate, whey, tryptophan, theanine, and 5'AMP) versus placebo on objective and subjective sleep, next-morning physical performance, cognitive function, and postural sway. Seventeen healthy, trained adult males completed three double-blind trials in a randomized, counterbalanced, crossover design. Participants were allocated to conditions using a Latin Square design. A (a) low-dose, (b) high-dose, or (c) placebo drink was provided 90 min before sleep each night. Polysomnography was used to measure objective sleep parameters. Cognitive function, postural sway, and subjective sleep quality were assessed 30 min after waking. Physical performance was assessed using a 10-min maximal effort cycling time trial each morning. All data were analyzed using linear mixed effects models and effect sizes were calculated using Cohen's d. This study was registered prospectively as a clinical trial with Australian New Zealand Clinical Trials Registry (registration number: NCT05032729). No significant main effects or improvements were observed in objective or subjective sleep parameters, physical performance, cognitive function, or postural sway. The low-dose intervention appeared to reduce N3 sleep duration compared with placebo (-13.6 min). The high-dose intervention appeared to increase N1 sleep duration compared with placebo (+7.4 min). However, the magnitude of changes observed were not likely to cause meaningful reductions in sleep quality and quantity.

配方营养干预对成年男性睡眠和第二天早晨身体表现、认知功能和姿势摇摆的最小影响:一项随机、安慰剂对照、交叉研究。
运动员经常经历睡眠质量和睡眠量差,这可能会影响身体表现和认知功能。睡眠前营养策略可能是一种替代药物干预,以改善睡眠。本研究的目的是检查两种不同剂量的营养干预(都含有高血糖指数碳水化合物、乳清、色氨酸、茶氨酸和5'AMP)与安慰剂对客观和主观睡眠、第二天早上的身体表现、认知功能和姿势摇摆的影响。17名健康、训练有素的成年男性在随机、平衡、交叉设计中完成了三项双盲试验。参与者被分配到使用拉丁广场设计的条件下。每晚睡前90分钟提供(A)低剂量、(b)高剂量或(c)安慰剂饮料。采用多导睡眠图测量客观睡眠参数。醒后30分钟评估认知功能、体位摇摆和主观睡眠质量。每天早上进行10分钟最大努力骑行计时赛来评估身体表现。所有数据均采用线性混合效应模型进行分析,效应量采用Cohen’s d计算。本研究在澳大利亚新西兰临床试验注册中心前瞻性注册为临床试验(注册号:NCT05032729)。在客观或主观睡眠参数、身体表现、认知功能或姿势摇摆方面未观察到显著的主要影响或改善。与安慰剂相比,低剂量干预似乎减少了N3睡眠时间(-13.6分钟)。与安慰剂相比,高剂量干预似乎增加了N1睡眠时间(+7.4分钟)。然而,观察到的变化幅度不太可能导致睡眠质量和睡眠时间的显著减少。
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来源期刊
CiteScore
5.00
自引率
8.00%
发文量
50
审稿时长
6-12 weeks
期刊介绍: The International Journal of Sport Nutrition and Exercise Metabolism (IJSNEM) publishes original scientific investigations and scholarly reviews offering new insights into sport nutrition and exercise metabolism, as well as articles focusing on the application of the principles of biochemistry, physiology, and nutrition to sport and exercise. The journal also offers editorials, digests of related articles from other fields, research notes, and reviews of books, videos, and other media releases. To subscribe to either the print or e-version of IJSNEM, press the Subscribe or Renew button at the top of your screen.
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