Why do we need...........?

Question

why do we need to sleep atleast 8 hour rest time.
and what would happen if you don't sleep?

Answer 1

All humans are essentially programmed to sleep at night and be active during the day, some people have a marked morning or evening preference. Many people don't assess how much sleep they need to function at their best. Each person's sleep requirement is different. Some people find that they only need 5-6 hours of sleep, while others need 10-11 hours for optimal performance. It is important to consider how much sleep you need on an individual basis.

For most adults, 7 to 8 hours a night appears to be the best amount of sleep, although the amount ranges from 5 hours to 10 hours of sleep each day depending on the individual. Sleeping less than 6 hours or more than 9 hours a day had an increased incidence of diabetes, compared to those who slept 7-8 hours.

Some people need sleep, some people don't. Each person sleeps different hours and they feel different about it. What's important is to find your own sleeping pattern that works for you. If your body demands more sleep you may just have to give it those hours.

Answer 2

I sleep 5 and a half hours a day, but around the 4th day you start getting a after affect and ultra sleepy.

Answer 3

We don't need sleep. Just as we do not need food or water. However, if we intend to live, we do not to sleep, as well as eat and drink. Why, it is the way in which our bodies heal the wounds from the previous day. Our sleep allows us to "recharge" our bodies. If you do not sleep, you will eventually drop. And in the meantime, you will find yourself slipping slowly into oblivion. If you don't believe us, simply try it, quit sleeping. If not, pleasant dreams!

Answer 4

I don't usually sleep eight hours a night. I am fine. Some people need more than eight, some are fine with less.

Answer 5

Sleep Is a Basic Human Need
Sleep is a natural part of everybody's life, but many people know very little about how important it is, and some even try to get by with little sleep. Sleep is something our bodies need to do; it is not an option. Even though the exact reasons for sleep remain a mystery, we do know that during sleep many of the body's major organ and regulatory systems continue to work actively. Some parts of the brain actually increase their activity dramatically, and the body produces more of certain hormones.

Sleep, like diet and exercise, is important for our minds and bodies to function normally. In fact, sleep appears to be required for survival. Rats deprived of sleep die within two to three weeks, a time frame similar to death due to starvation.

An internal biological clock regulates the timing for sleep. It programs each person to feel sleepy during the nighttime hours and to be active during the daylight hours. Light is the cue that synchronizes the biological clock to the 24-hour cycle of day and night.

Problem Sleepiness Has Serious Consequences
Sleepiness due to chronic lack of adequate sleep is a big problem in the United States and affects many children as well as adults. Children and even adolescents need at least 9 hours of sleep each night to do their best. Most adults need approximately 8 hours of sleep each night.

When we get less sleep (even one hour less) than we need each night, we develop a "sleep debt." If the sleep debt becomes too great, it can lead to problem sleepiness – sleepiness that occurs when you should be awake and alert, that interferes with daily routine and activities, and reduces your ability to function. Even if you do not feel sleepy, the sleep debt can have a powerful negative effect on your daytime performance, thinking, and mood, and cause you to fall asleep at inappropriate and even dangerous times.

Problem sleepiness has serious consequences – it puts adolescents and adults at risk for drowsy driving or workplace accidents. In children, it increases the risk of accidents and injuries. In addition, lack of sleep can have a negative effect on children's performance in school, on the playground, in extracurricular activities, and in social relationships.

Inadequate sleep can cause decreases in:

Performance
Concentration
Reaction Times
Consolidation of Information Learning
Inadequate sleep can cause increases in:

Memory Lapses
Accidents and Injuries
Behavior Problems
Mood Problems
Signs of Sleep Disorders
A child who has not obtained adequate nighttime sleep is at high risk for symptoms of physical and/or mental impairment. The child may fall asleep in school, have difficulty concentrating in school and other activities, and/or exhibit behavioral problems. Some children who are sleepy become agitated rather than lethargic and may be misdiagnosed as hyperactive. Not getting enough sleep is one cause of problem sleepiness. Undiagnosed/untreated sleep disorders can also cause problem sleepiness. Children as well as adults can suffer from sleep disorders. Parents should talk to their pediatrician about a possible sleep disorder if their child has any of the following:

Snoring
Breathing Pauses During Sleep
Problems with Sleeping at Night
Difficulty Staying Awake During the Day
Unexplained Decrease in Daytime Performance

Answer 6

you must sleep that long to enter a REM state of sleep. it reenergizes your body. it allows you to carry out necessary functions. you can either get exahustion or just pass out if you dont sleep