how many hours deep sleep should you get

Most adults should aim for about 1.5 to 2 hours of deep sleep per night, which typically accounts for about 20-25% of total sleep time. Since adults are recommended to get at least 7 to 8 hours of sleep nightly, this means spending roughly 90 to 120 minutes in deep sleep is ideal. Deep sleep is a critical phase for physical recovery, immune system strengthening, tissue repair, and hormone release. The exact amount of deep sleep needed can vary with age, health, and activity level, with younger and more active individuals generally requiring more deep sleep. Ensuring sufficient deep sleep supports overall health, mood, and cognitive function.