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.
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| Názov: | 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. |
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| Autori: | Morrison, Matthew1,2 (AUTHOR) matthew.morrison@myacu.edu.au, Weakley, Jonathon1,2,3 (AUTHOR), Roach, Gregory D.4 (AUTHOR), Sargent, Charli4 (AUTHOR), Miller, Dean J.4 (AUTHOR), Nyman, Lara5 (AUTHOR), Gardiner, Carissa1,2 (AUTHOR), Munteanu, Gabriella1,2 (AUTHOR), Pahnke, Matthew D.6 (AUTHOR), Halson, Shona L.1,2 (AUTHOR) |
| Zdroj: | International Journal of Sport Nutrition & Exercise Metabolism. May2025, Vol. 35 Issue 3, p192-205. 14p. |
| Predmety: | *COGNITIVE testing, *RESEARCH funding, *BLIND experiment, *RANDOMIZED controlled trials, *ELEMENTAL diet, *CROSSOVER trials, *SLEEP quality, *BODY movement, *POLYSOMNOGRAPHY, *DIET therapy, *TIME, *POSTURAL balance, *ADULTS |
| Geografický termín: | ILLINOIS |
| Abstrakt: | 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. Sleep is essential for athletes to perform, yet athletes often experience poor sleep, which may hinder physical performance and cognitive function. To enhance sleep, athletes may turn to consuming pharmacological interventions (e.g., sleeping medication). However, the use of pharmacological interventions to improve sleep may be detrimental, with "hangover" type effects potentially manifesting the next morning, which may impair cognitive performance. Presleep nutritional interventions have shown promise with their ability to improve sleep without inducing next-morning cognitive impairments and may be a viable alternative to pharmacological interventions. The aim of this study was to investigate the effects of two different doses of a nutritional intervention versus a placebo on sleep and next-day cognitive function and physical performance, in healthy trained adult males. The study used a double-blind, repeated-measures, placebo-controlled study design to assess the effects of a low- and high-dose nutritional intervention versus placebo on sleep. The nutritional interventions contained high Glycemic Index carbohydrates, whey, tryptophan, theanine, and 5′AMP, all ingredients linked to improving sleep. Seventeen healthy, adult, physically trained male participants completed the study. All participants were required to attend and stay in a purpose-built sleep laboratory for four nights, where their sleep quality and quantity were measured using gold-standard measurement techniques (i.e., polysomnography). While in the sleep laboratory, participants consumed a standardized diet and did not consume any alcohol or caffeine. Each night participants consumed either a low- or high-dose nutritional intervention or placebo at 21:00 hr, prior to bedtime. Participants were provided a 10.5-hr sleep opportunity between 22:30 hr and 08:00 hr where their sleep was measured. Each morning participants were required to undertake cognitive and balance testing as well as a high-intensity cycling time trial to assess the influence of the nutritional intervention on cognitive function, balance, and physical performance. In the afternoon, participants completed a high-intensity cycling exercise session to replicate the typical demands of an athlete's schedule. When participants were not exercising, they were asked to undertake sedentary activities and rest. There were no significant effects on objective sleep, subjective sleep, cognitive function, or balance, or physical performance observed after consuming the low- or high-dose nutritional interventions. Although the nutritional interventions did not improve sleep, there were also no negative effects on next-morning cognitive function, balance, or physical performance. The nutritional interventions did not improve sleep in our study. This may have been due to the composition of the nutritional interventions, with the combination and/or dose of ingredients included not being effective for improving the sleep of participants. Another potential reason for not seeing improvements in sleep after the consumption of the nutritional interventions is that the participants recruited were already good sleepers and had limited room to improve. Whether the interventions would be more effective in poor sleepers or when consumed as a part of an athlete's day-to-day life would be important to consider in future research. A positive finding from our study was the nutritional interventions did not induce any negative next-morning effects on cognitive function or physical performance. [ABSTRACT FROM AUTHOR] |
| Databáza: | Academic Search Index |
Nájsť tento článok vo Web of Science | Abstrakt: | 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. Sleep is essential for athletes to perform, yet athletes often experience poor sleep, which may hinder physical performance and cognitive function. To enhance sleep, athletes may turn to consuming pharmacological interventions (e.g., sleeping medication). However, the use of pharmacological interventions to improve sleep may be detrimental, with "hangover" type effects potentially manifesting the next morning, which may impair cognitive performance. Presleep nutritional interventions have shown promise with their ability to improve sleep without inducing next-morning cognitive impairments and may be a viable alternative to pharmacological interventions. The aim of this study was to investigate the effects of two different doses of a nutritional intervention versus a placebo on sleep and next-day cognitive function and physical performance, in healthy trained adult males. The study used a double-blind, repeated-measures, placebo-controlled study design to assess the effects of a low- and high-dose nutritional intervention versus placebo on sleep. The nutritional interventions contained high Glycemic Index carbohydrates, whey, tryptophan, theanine, and 5′AMP, all ingredients linked to improving sleep. Seventeen healthy, adult, physically trained male participants completed the study. All participants were required to attend and stay in a purpose-built sleep laboratory for four nights, where their sleep quality and quantity were measured using gold-standard measurement techniques (i.e., polysomnography). While in the sleep laboratory, participants consumed a standardized diet and did not consume any alcohol or caffeine. Each night participants consumed either a low- or high-dose nutritional intervention or placebo at 21:00 hr, prior to bedtime. Participants were provided a 10.5-hr sleep opportunity between 22:30 hr and 08:00 hr where their sleep was measured. Each morning participants were required to undertake cognitive and balance testing as well as a high-intensity cycling time trial to assess the influence of the nutritional intervention on cognitive function, balance, and physical performance. In the afternoon, participants completed a high-intensity cycling exercise session to replicate the typical demands of an athlete's schedule. When participants were not exercising, they were asked to undertake sedentary activities and rest. There were no significant effects on objective sleep, subjective sleep, cognitive function, or balance, or physical performance observed after consuming the low- or high-dose nutritional interventions. Although the nutritional interventions did not improve sleep, there were also no negative effects on next-morning cognitive function, balance, or physical performance. The nutritional interventions did not improve sleep in our study. This may have been due to the composition of the nutritional interventions, with the combination and/or dose of ingredients included not being effective for improving the sleep of participants. Another potential reason for not seeing improvements in sleep after the consumption of the nutritional interventions is that the participants recruited were already good sleepers and had limited room to improve. Whether the interventions would be more effective in poor sleepers or when consumed as a part of an athlete's day-to-day life would be important to consider in future research. A positive finding from our study was the nutritional interventions did not induce any negative next-morning effects on cognitive function or physical performance. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 1526484X |
| DOI: | 10.1123/ijsnem.2024-0148 |