Sleep is a vital physiological activity essential for restoring energy, regulating hormones, and supporting cardiovascular health. Poor sleep increases the risk of psychological issues, creating a harmful cycle that weakens immunity. Good sleep promotes recovery, brain function, memory, resistance, emotional regulation, and healthy aging. Sleep needs vary by age, from 16-20 hours for newborns to 5 hours for the elderly. Consistent routines, relaxation, and avoiding stimulants or heavy meals before bed improve sleep quality.
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