睡得不够,狂饮咖啡也没有用

一项新近研究表明,如果每天只睡5小时,那么3天后,咖啡因对于提神醒脑及工作绩效完全没有帮助。研究结果显示,与安慰剂相比,咖啡因在前两天能够显著提高精神运动警觉性作业(PVT),而从第三天起便失效了。该研究的摘要近日发表于Sleep,在本月13、14日于美国丹佛召开的第30届联合专业睡眠学会(APSS)年会上,研究者对该研究进行了报告展示。

20140403015107382

https://www.sciencedaily.com/releases/2016/06/160613130813.htm

Caffeine has little to no benefit after 3 nights of sleep restriction

New study shows caffeine is not sufficient to prevent performance decline long term

A new study found that after restricting sleep to 5 hours per night, caffeine use no longer improved alertness or performance after three nights.

Results show that relative to placebo, caffeine significantly improved Psychomotor Vigilance Task (PVT) performance during the first 2 days, but not the last 3 days of sleep restriction.

"We were particularly surprised that the performance advantage conferred by two daily 200 mg doses of caffeine was lost after three nights of sleep restriction," said lead author Tracy Jill Doty, PhD, research scientist at Walter Reed Army Institute of Research. "These results are important, because caffeine is a stimulant widely used to counteract performance decline following periods of restricted sleep. The data from this study suggests that the same effective daily dose of caffeine is not sufficient to prevent performance decline over multiple days of restricted sleep."

The research abstract was published recently in an online supplement of the journal Sleep and will be presented Monday, June 13 and Tuesday, June 14, in Denver at SLEEP 2016, the 30th Anniversary Meeting of the Associated Professional Sleep Societies LLC (APSS).

The study group consisted of 48 healthy individuals who participated in a double blind, placebo-controlled study. Sleep was restricted to five hours of time in bed for a total of five days. Participants were administered either 200 mg of caffeine or a placebo twice daily. A cognitive task battery was administered hourly during the wake periods and included a 10-minute PVT, Profile of Mood States (POMS), and the Stanford Sleepiness Scale (SSS). A modified Maintenance of Wakefulness Test (mMWT) was administered six times per day.


Comments are closed.



无觅相关文章插件