Most adults need about 1.5 to 2 hours of deep sleep per night, which typically makes up around 20-25% of total sleep time. For example, if you sleep 7 to 8 hours, you should get roughly 105 to 120 minutes of deep sleep
. Deep sleep usually occurs in the first half of the night and is essential for physical restoration, muscle and tissue repair, immune system strengthening, and memory consolidation
. The amount of deep sleep tends to decrease with age, with older adults getting less deep sleep and more light sleep, which is normal
. In summary:
- Adults need about 7+ hours of sleep per night.
- Deep sleep should be about 20-25% of total sleep, or 1.5 to 2 hours.
- Deep sleep decreases with age.
- Getting enough deep sleep is crucial for health and wellbeing
If you get significantly less than this amount, such as only 45 minutes, it may not be enough to support optimal health
