The age at which you start needing less sleep is 20 years of age.
When you're first born you need lots of sleep and as you get older and older you need less sleep.
Newborns can sleep as much as 14 hours to 17 hours which is a lot but the newborns need that amount of sleep.
As the newborn grows they start needing less sleep.
As you age your body produces lower levels of growth hormone, so you'll likely experience a decrease in slow wave or deep sleep (an especially refreshing part of the sleep cycle).
When this happens you produce less melatonin, meaning you'll often experience more fragmented sleep and wake up more often during the night.
For adults the recommended number of hours is 7 to 9 hours, with 6 hours or 10 hours of sleep deemed appropriate on either side. It is not a good idea to get 6 hours or less of sleep
Sometimes life calls and we don't get enough sleep.
But five hours of sleep out of a 24-hour day isn't enough, especially in the long term.
According to a 2018 study of more than 10,000 people, the body's ability to function declines if sleep isn't in the seven- to eight-hour range.
Contrary to our quiet physical state, the brain is very active during sleep, carrying out many important functions.
Sleep is essential to every process in the body, affecting our physical and mental functioning the next day, our ability to fight disease and develop immunity, and our metabolism and chronic disease risk.
A number of chronic health conditions may be affected by not getting enough sleep on a regular basis.
These include high blood pressure, diabetes, heart failure, coronary heart disease and some cancers.
You may also be more likely to have a stroke. You're at greater risk of injury.
An insomniac is someone who experiences insomnia the inability to fall asleep or stay asleep for an adequate amount of time.
Insomnia is often used casually to refer to occasional sleeplessness or a single instance of it.
Insomnia is a sleep disorder in which you have trouble falling and/or staying
The condition can be short-term (acute) or can last a long time (chronic).
It may also come and go.
Acute insomnia lasts from 1 night to a few weeks.
Insomnia is chronic when it happens at least 3 nights a week for 3 months or more.