ABSTRACT

The current study aimed to examine the effects of caffeine consumption on physical and cognitive performance after an endurance race following one night of sleep deprivation. Ten recreational runners performed four test sessions in a randomized order at 09:00 h after placebo or 5 mg/kg of caffeine ingestion during a baseline night (BN) (bedtime: from 22:30 h to 07:00 h) or a night of total sleep deprivation (TSD) (26 hours of continuous wakefulness). At each session, they completed an 8-km running competition around a 400 m outdoor athletics track, and they performed the correct detection and the reaction-time tasks. In comparison with BN, performance-time and reaction-time increased, and correct detections decreased after TSD condition. Compared to placebo, caffeine ingestion improved 8-km performance-time by 48 sec (2.8%) after BN and 108 sec (4.9%) after TSD, increased correct detections after BN (p < 0.01) and TSD (p < 0.05), and decreased reaction-time after BN (p < 0.001) and TSD (p < 0.05). Therefore, caffeine is an effective strategy to mitigate the adverse effects of total sleep deprivation on physical and cognitive performance.

摘要

目前的研究旨在检查一晚睡眠剥夺后的耐力赛后，摄入咖啡因对身体和认知表现的影响。10 名休闲跑步者在基线之夜 (BN)（就寝时间：从 22:30 到 07:00）或一晚安慰剂或 5 mg/kg 咖啡因摄入后 09:00 以随机顺序进行四次测试总睡眠剥夺 (TSD)（26 小时连续清醒）。在每节课中，他们围绕 400 m 的户外田径跑道完成了 8 公里的跑步比赛，并执行了正确的检测和反应时间任务。与 BN 相比，TSD 条件后性能时间和反应时间增加，正确检测减少。与安慰剂相比，在 BN 和 108 秒 (4. TSD 后 9%)，BN (p < 0.01) 和 TSD (p < 0.05) 后的正确检测增加，BN (p < 0.001) 和 TSD (p < 0.05) 后的反应时间减少。因此，咖啡因是减轻完全睡眠剥夺对身体和认知表现的不利影响的有效策略。