Editing Power nap (section)

=={{anchor|Coffee nap}}Stimulant nap==
[[File:Coffe time.jpg|thumb|right|A coffee nap is drinking a cup of coffee before a short 15-minute nap.]]
A stimulant nap is a brief period of sleep of around 15 minutes, preceded by consuming a [[caffeine|caffeinated]] drink or another stimulant.

It may combat daytime drowsiness more effectively than napping or drinking coffee alone.<ref name="twsYun" /><ref name="twsPreventionMag" /><ref name="twsAUDoC" /> A stimulant nap is more effective than regular naps in improving post-nap alertness and cognitive functioning.<ref name="twsNYTimes" /><ref name="twsSmithsonian" /> In a driving simulator and a series of studies, Horne and Reyner investigated the effects of cold air, radio, a break with no nap, a nap, caffeine pill vs. placebo and a short nap preceded by caffeine on mildly sleep-deprived subjects. A nap with caffeine was by far the most effective in reducing driving accidents and subjective sleepiness as it helps the body get rid of the sleep-inducing chemical compound [[adenosine]].<ref name="twsOprahMag" />{{unreliable source?|date=February 2021}} Caffeine in coffee takes up to half an hour to have an alerting effect, hence "a short (<15min) nap will not be compromised if it is taken immediately after the coffee."<ref name="Horne1996">{{cite journal |pmid=9485532 |year=1998 |last1=Reyner |first1=LA |last2=Horne |first2=JA |title=Evaluation 'in-car' countermeasures to sleepiness: Cold air and radio |volume=21 |issue=1 |pages=46–50 |journal=Sleep}}</ref><ref name="Horne1995">{{cite journal |doi=10.1111/j.1365-2869.1995.tb00222.x |title=Driver sleepiness |year=1995 |last1=Horne |first1=J. A. |last2=Reyner |first2=L. A. |journal=Journal of Sleep Research |volume=4 |pmid=10607207 |pages=23–29 |issue=S2|s2cid=45193968 |doi-access=free }}</ref><ref>{{cite web |title= Loughborough University researchers issue new warning to tired drivers |url=http://www.lboro.ac.uk/service/publicity/news-releases/2004/04_110_micro-sleep.html |access-date=2007-09-23}}</ref> One account suggested that it was like a "double shot of energy" from the stimulating boost from caffeine plus better alertness from napping.<ref name="twsYun" /> This procedure has been studied on sleep-deprived humans given the task of driving a motor vehicle afterwards,<ref name="twsPsychophysiology" /> although it has not been studied on elderly populations.<ref name="twsSleepJournal" />