Beauty and health
- The norm of deep sleep in an adult and how to correct it
- How many hours should an adult sleep in deep sleep?
- Do you want to know how much sleep an adult needs per day and what REM is?
- Why do you wake up at three in the morning?
- Sleep: sleep norms, duration
- How much sleep should a person sleep per day?
- Frequent awakenings at night (intermittent sleep)
- How much sleep do you need to be productive?
- Human sleep phases by time - table
- The eternal question is, how much sleep does an adult need per day?
- How much time does an adult need for proper sleep - the daily norm for health
- The norm of deep sleep in an adult and its correction