Daytime napping has historically received a bad rap because it was thought to interfere with nighttime sleep. But lately, daytime naps have been peeling off their bad-for-you reputation layer by layer. For one instance, a recent study by Weill Cornell Medical College in White Plains, N.Y, researchers concluded that significant cognitive benefits and increase in overall sleep time in older people were found as a result of napping, as reported in Harvard Health Publications.
Excessive sleepiness, particularly excessive daytime sleepiness, is the hallmark sign of hypersomnia. Hypersomnia can also be characterized by prolonged sleep at night. Up to 40 percent of people experience symptoms of hypersomnia at one time or the other, reports WebMd. Some people inflicted with this sleep disorder have trouble functioning at work and school and interacting with family, friends, and in other social situations.