"Data shows that napping for around 20 minutes can improve your alertness for the rest of the day but this can delay onset of sleep later on at night," says Dr Russell Foster, professor of circadian neuroscience at the University of Oxford, and head of the Nuffield Laboratory of Ophthalmology.
In fact, this technique can increase your alertness for up to 2 hours.
"We have got to understand that all our lives the danger, the uncertainty, the need for alertness, for effort, for discipline will be upon us . . .
This may raise your level of alertness for a reasonable amount of driving time.
Nancy J. Wesensten, a research psychologist at the Walter Reed Army Institute of Research who is searching for alertness drugs for soldiers, tested modafinil against caffeine in volunteers kept awake for 54 hours.
The placebo and pharmacological effects of caffeine are additive for feelings of alertness but not for feelings of tension, and similarly mixed results have been reported for other stimulants [ 12].
staff were encouraged to keep assessing patients for pain, alertness and delirium.
Ms. Stone has been praised for her alertness as well as criticized for what civil-liberties advocates said was paranoia.
But for the alertness of David Laws, Lib Dem education spokesman, he would have got away with it.
Those who do not drink coffee but decide to start for the alertness benefits may find the side effects of caffeine, like shakiness and decreased concentration, too disconcerting.
