Everyone needs sleep. Sleep allows the body to rest and affects both physical and mental health. While scientists are unsure of everything that sleep does for the body, there is no question that sleep is necessary for survival. But, how much sleep does a person really need?

The amount of sleep a person requires is affected by the person’s age. As people age, they tend to need less sleep. Babies need an average of 16 hours of sleep per day and teenagers require approximately nine hours. By the time someone is an adult, they generally need an average of seven to eight hours in order to remain in optimal health. Some people may function effectively on as little as five hours of sleep and others may need as many as ten hours per night in order to feel their best.
Other factors that affect someone’s sleep requirements are the amount of sleep they have had in recent days and their general health. For example, a pregnant woman usually needs additional sleep in her first trimester. Someone who is ill or has a depressed immune system generally needs additional rest as well. When the immune system is depressed, the body produces chemicals to fight infection; these same chemicals induce sleep. Very elderly people often find that they sleep less than when they were younger adults. Read more…
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