Effect of Ingestion of Ice Slurry on the Sleep Quality of Rugby Union Players in the Summer Season

Akihisa Morito, T. Inami, Akihiro Hirata, Satoshi Yamada, Masatsugu Shimomasuda, Keita Kato, Shigeyuki Tahara, N. Kohtake
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引用次数: 1

Abstract

The aim of this study was to investigate the effect of ingestion of ice slurry before bedtime on the sleep quality of rugby union players in the summer season. Thirteen healthy male university rugby union players volunteered for this study. The participants ingested either ice slurry or a room-temperature beverage (control) 30 min before bedtime. A wearable activity-based sleep monitor was used to analyze objective sleep parameters, and the subjective sleep scores were assessed using the Oguri–Shirakawa–Azumi Sleep Inventory, middle-aged and aged version (OSA-MA). No differences in the amount or efficiency of sleep were observed between the ice slurry/control beverage conditions. Significant shortening of the sleep latency was observed in the ice slurry condition as compared with the control beverage condition. Moreover, significant improvement of the subjective sleep score for “feeling refreshed” on the OSA-MA was observed in the ice slurry condition. There were no significant differences in the other subjective sleep scores between the two conditions. The results suggest that ice slurry ingestion before bedtime may improve the latency of sleep onset, accelerate recovery from fatigue, and be useful as a sleep improvement strategy in rugby union players engaging in exercises during the summer season.
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夏季摄入冰浆对橄榄球联盟运动员睡眠质量的影响
本研究的目的是调查睡前摄入冰浆对夏季橄榄球联盟球员睡眠质量的影响。13名健康的大学橄榄球联盟男队员自愿参加了这项研究。参与者在睡前30分钟摄入冰浆或室温饮料(对照)。使用可穿戴的基于活动的睡眠监测仪分析客观睡眠参数,并使用Oguri–Shirakawa–Azumi中老年睡眠量表(OSA-MA)评估主观睡眠得分。在冰浆/对照饮料条件之间没有观察到睡眠量或效率的差异。与对照饮料条件相比,在冰浆条件下观察到睡眠潜伏期显著缩短。此外,在冰浆条件下,观察到OSA-MA的主观睡眠得分在“感觉神清气爽”方面有显著改善。两种情况下的其他主观睡眠得分没有显著差异。研究结果表明,睡前摄入冰浆可以改善睡眠延迟,加速疲劳恢复,并可作为橄榄球联盟球员在夏季锻炼时的睡眠改善策略。
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