Qaylulah is powernap or afternoon nap
Sleep is a blessing from Allah. Humans spend around one third of their lives sleeping. Sleep is essential for the performance of important daily acts such as speech, memory, and original or flexible thinking.
Taking a nap in the afternoon was the practice recommended by the companions of the Prophet (peace be upon him).
If we turn our attention to the life of the Prophet Muhammad, (peace and blessings be upon him) we see how he successfully set an example for his Companions.
“qaylulah,” which is in accordance with the Sunna of the Prophet. It is from mid-morning to just past noon. This sleep is part of the Sunna since it allows a person to rise at night to pray. So also in the Arabian Peninsula to rest from work at noon when it is intensely hot is the custom of the people and of the area, so has further strengthened this Practice of the Prophet. This sleep increases both life and sustenance. For half an hour’s qaylula sleep is the equivalent of two hours’ sleep at night. That means it adds one and a half hours to a person’s life every day. It saves one and a half hours from the hand of sleep, the brother of death, and makes it live, adding it to the time of working for one’s livelihood.
Qaylulah and Science
New research has found that young adults who slept for 30 to 90 minutes after lunch raised their learning power, their memory apparently primed to absorb new facts.
New research raises the prospect that sleep, specifically a lengthy afternoon nap, prepares the brain to remember things. Think of it as similar to rebooting a computer to get it to work more smoothly.
"Sleep is not just for the body. It's very much for the brain," said study author Matthew Walker, an assistant professor at the University of California at Berkeley.
Scientist David Dinges helped found the modern science of napping in the early '80s at the University of Pennsylvania School of Medicine, short periods of sleep have been shown to improve alertness, memory, motor skills, decision-making, and mood. All while cutting down on stress, carelessness, and even heart disease.
"Tiny naps are much more refreshing than people tend to realize," said Jim Horne, director of the Sleep Research Centre at Loughborough University in England. "A short nap in the afternoon will get rid of sleepiness without interfering with nighttime sleep."
(CNN): [...] “In most workplaces, especially workplaces involving safety, you want your workers to be maximally alert, and napping is actually a good strategy to maintain alertness,” says Dr. Thomas Balkin of the National Sleep Foundation. “So during slow periods, scheduled naps, if you’re napping in a safe place, being offline, that’s the best strategy to maintain alertness,” he says.
Qaylulah in corporate world
Following the rise of workplace perks like lactation rooms, gyms, and child-care facilities, Nike (NKE) workers now have access to nap-friendly "quiet rooms" that can also be used for meditation. Google (GOOG), a forerunner in employee perks, has a number of futuristic napping pods scattered throughout its Mountain View (Calif.) campus.