Fighting afternoon fatigue? Try a quick nap instead of a cup of java, researchers say.

A study, presented this weekend at an international sleep conference in Cairns, Australia, found that the power nap is mightier than a hit of caffeine, according to a report at News.com.au.

Researchers from Loughborough University in the United Kingdom tested three popular options for fighting mid-afternoon tiredness on 14 "good sleepers," they said during a presentation at the 5th World Congress of the World Federation of Sleep Research and Sleep Medicine Societies.

Click here to read the News.com.au story

The three methods tested were 90 minutes of extra sleep in the morning; a 20-minute nap at 2 in the afternoon; or a cup of coffee at 2:30 p.m. The scientists analyzed how each affected levels of alertness throughout the day and into the evening.

They found that a 20-minute siesta was a far better answer than coffee, and both coffee and a nap were better options than an extra long sleep-in.