Napping Benefits & Tips - National Sleep Foundation
www.sleepfoundation.org
As a nation, the United States appears to be becoming more and more sleep deprived. And it may be our busy lifestyle that keeps us from napping. While naps do not necessarily make up for inadequate or poor quality nighttime sleep, a short nap of 20-30 minutes can help to improve mood, alertness and performance. Nappers are in good company: Winston Churchill, John F. Kennedy, Ronald Reagan, Napoleon, Albert Einstein, Thomas Edison and George W. Bush are known to have valued an afternoon nap. Types Planned napping (also called preparatory napping) involves taking a nap before you actually get sleepy. You may use this technique when you know that you will be up later than your normal bed time or as a mechanism to ward off getting tired earlier. Emergency napping occurs when you are suddenly very tired and cannot continue with the activity you were originally engaged in. This type of nap can be used to combat drowsy driving or fatigue while using heavy and dangerous machinery. Habitual napping is practiced when a person takes a nap at the same time each day. Young children may fall asleep at about the same time each afternoon or an adult might take a short nap after lunch each day. Shift work, which means working a schedule that deviates from the typical "9 to 5" hours, may cause fatigue and performance impairments, especially for night shift workers. In a 2006 study, researchers at the Sleep Medicine and Research Center affiliated with St. John's Mercy Medical Center and St. Luke's Hospital in suburban St. Louis, MO, looked at the effectiveness of taking naps and consuming caffeine to cope with sleepiness during the night shift. They found that both naps and caffeine improved alertness and performance among night shift workers and that the combination of naps and caffeine had the most beneficial effect. James K. Walsh, PhD, one of the researchers who conducted the study, explains, "Because of the body's propensity for sleep at night, being alert and productive on the night shift can be challenging, even if you've had enough daytime sleep." "Napping before work combined with consuming caffeine while on the job is an effective strategy for remaining alert on the night shift." Negative Effects Naps can leave people with sleep inertia, especially when they last more than 10-20 minutes. Sleep inertia is defined as the feeling of grogginess and disorientation that can come with awakening from a deep sleep. While this state usually only lasts for a few minutes to a half-hour, it can be detrimental to those who must perform immediately after waking from a napping period. Post-nap impairment and disorientation is more severe, and can last longer, in people who are sleep deprived or nap for longer periods. Napping can also have a negative effect on other sleeping periods. A long nap or a nap taken too late in the day may adversely affect the length and quality of nighttime sleep. If you have trouble sleeping at night, a nap will only amplify problems. One study has indicated that napping is associated with increased risk of heart failure in people already at risk. Napping indicates laziness, a lack of ambition, and low standards. Napping is only for children, the sick and the elderly. A recent study in the research journal Sleep examined the benefits of naps of various lengths and no naps. The results showed that a 10-minute nap produced the most benefit in terms of reduced sleepiness and improved cognitive performance. A nap lasting 30 minutes or longer is more likely to be accompanied by sleep inertia, which is the period of grogginess that sometimes follows sleep. By now you're probably thinking about ways to incorporate naps into your daily routine. Keep in mind that getting enough sleep on regular basis is the best way to stay alert and feel your best. But when fatigue sets in, a quick nap can do wonders for your mental and physical stamina.