See Full Reference advise that healthy adults needThe term information need is often understood as an individual or group's desire to locate and obtain information to satisfy a conscious or unconscious need. Rarely mentioned in general literature about needs, it is a common term in information science.https://en.wikipedia.org › wiki › Information_needs
Sleep needs can vary from person to person, but in general, experts recommend that healthy adults get an average of 7 to 9 hours per night of shuteye. If you regularly need more than 8 or 9 hours of sleep per night to feel rested, it might be a sign of an underlying problem, Polotsky says.
Despite these trends, the research mostly agrees that six hours of sleep is not enough for most adults. Experts recommend that most adults need at least seven hours of sleep every night.
You can function on 5 hours of sleep, but that shouldn't be your norm. Some people, appropriately called short sleepers, just don't need a lot of sleep. In fact, they're at their max with less than 6 hours a night.
Not surprisingly, test subjects who slept the recommended eight hours a night had the highest performance ratings. Those who slept six hours a night did fine until nearing the end of the study, around day 10, and those functioning on just four hours of sleep were noticeably worse each day.
If you nap in the morning, the sleep consists primarily of light NREM (and possibly REM) sleep. In contrast, napping later in the evening, as your sleep drive increases, will comprise more deep sleep. This, in turn, may disrupt your ability to fall asleep at night. Therefore, napping late in the day is discouraged.
This is because our brain is constantly forming new connections while we are awake. The longer we are awake, the more active our minds become. Scientists believe that this is partly why sleep deprivation has been shown to reduce symptoms of depression. However, there are negative outcomes of this, too.
So why do people think they are able to function optimally on 6 hours of regular sleep? This is because of a natural human phenomenon known as 'renorming'. Renorming means that we are only able to compare how we feel today to how we felt yesterday or the day before.
For adults, getting less than seven hours of sleep a night on a regular basis has been linked with poor health, including weight gain, having a body mass index of 30 or higher, diabetes, high blood pressure, heart disease, stroke, and depression.
Sleep deficiency is linked to many chronic health problems, including heart disease, kidney disease, high blood pressure, diabetes, stroke, obesity, and depression. Sleep deficiency is also linked to a higher chance of injury in adults, teens, and children.
pubmed.ncbi.nlm.nih.gov advise that healthy adults need between 7 and 9 hours of sleep per night. Babies, young children, and teens need even more sleep to enable their growth and development. People over 65 should also get 7 to 8 hours per night.
Most likely, you're still tired after eight hours of sleep because of these three factors: (1) you don't know your sleep need, (2) you're not taking into account your sleep efficiency, and (3) you carry sleep debt.
Hypersomnia means excessive sleepiness. There are many different causes, the most common in our society being inadequate sleep. This may be due to shiftwork, family demands (such as a new baby), study or social life. Other causes include sleep disorders, medication, and medical and psychiatric illnesses.
Research bears out the connection between too much sleep and too little energy. It appears that any significant deviation from normal sleep patterns can upset the body's rhythms and increase daytime fatigue.
Fu says researchers have found that short sleepers tend to be more optimistic, more energetic and better multitaskers. They also have a higher pain threshold, don't suffer from jet lag and some researchers believe they may even live longer.
The most common cause of sleepiness is not sleeping long enough. Getting enough restful sleep is crucial for maintaining good health. Research over the past decade has shown that healthy sleep is just as important as exercising regularly and eating a healthy diet.
If you have built up sleep debt, allow extra time for sleep: go to bed early. You sleep more deeply when you are sleep deprived, so you do not need to “pay back” hour for hour the lost sleep. However, if you have not had enough sleep for many days, it might take several nights of good-quality sleep to recover.
This sleep inertia, or transition from sleep to wake that comes with temporary grogginess, is part of the natural sleep-wake cycle. Sleep inertia typically lasts for 60-90 minutes. Natural light, exercise, coffee, and low sleep debt can help reduce its length and severity.
Interview Highlights. What is hypersomnia: “Hypersomnia is when people sleep too much. When they wake up, even though they've slept ten, 12 hours, they don't feel rested. During the daytime, they also get sleepy or have small naps, and therefore hypersomnia lasts all 24 hours.
Sleep need gets less with age until around 20 years old when it stabilises. How much and how fast this happens depends on the person. It is normal for children to have daytime naps until 3 to 5 years old. If a child takes naps often past this age, he or she might not be sleeping enough at night.
Children and adolescents need more sleep than adults. Interestingly, older adults need about the same amount of sleep as younger adults — seven or more hours of sleep per night. Unfortunately, many older adults often get less sleep than they need. One reason is that they often have more trouble falling asleep.
As people age, the body secretes less melatonin, which is normally produced in response to darkness that helps promote sleep by coordinating circadian rhythms.