On the other hand, adults aged 65 years or older should sleep for 7-8 hours daily, not exceeding 9 hours and not getting less than 5 hours of sleep 2.
It plays a critical role in different brain functions, such as facilitating memory consolidation, impacting cognitive and neurobehavioral performance, mood regulation, and subserving the brain clearance of various toxic waste products 3, 4, 5, 6, 7, 8, 9.Īccording to the National Sleep Foundation, young adults aged between 18-25 years and adults aged 26 to 64 years should optimally have 7-9 hours of sleep. Therefore, sleep is considered a vital component of human life and essential for a person’s health and well-being. Even prehistoric evidence suggests the importance of sleep in human life, which is consistent with archaeological and historical accounts of sleep having a prominent and important role even in early human societies 1, 2. Sleep occupies between 20% and 40% of the human day.
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