The number of hours of sleep you need to stay healthy and alert differs according to your gender and age.
Sleep is key to your physical health and emotional vitality, but just how many hours of sleep you need depends on your age, your stage of development, and your gender.
“Sleep is important for mental function: alertness, memory consolidation, mood regulation, and physical health,” says Phyllis C. Zee, MD, PhD, professor of neurology and director of the Sleep Disorders Center at ...
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