1. How much sleep is enough for humans?
- A
Depends on age
According to MSc. Dr. Hoang Chau Bao Dinh, Tam Anh General Hospital, Ho Chi Minh City, for adults, sleep time should last from 7 to 9 hours per night. For children and people under 18 years old, sleep time can vary depending on age. Children under 1 year old should sleep 12 - 16 hours per day, while children from 1 to 5 years old need 11 - 14 hours of sleep. From 6 to 12 years old, children can reduce their total sleep time to 9 - 12 hours. At 13 - 18 years old, the required sleep time per day is 8 - 10 hours.
- B
8 hours
- C
9 hours
- D
10 hours
2. How many cycles does a sleep usually have?
- A
1 – 2 cycles
- B
2 – 3 cycles
- C
3 – 4 cycles
- D
4 – 5 cycles
According to MSc. Dr. Hoang Chau Bao Dinh, Tam Anh General Hospital, Ho Chi Minh City, studies on human sleep cycles show that on average, there are 4-5 sleep cycles in a night. The total number of sleep cycles per night can vary from person to person and changes due to many factors such as age, sleeping habits, lifestyle, and drinking before bed.
3. How long does a sleep cycle last?
- A
50 – 60 minutes
- B
60 – 70 minutes
- C
70 – 80 minutes
- D
90 – 110 minutes
On average, a sleep cycle lasts about 90 to 110 minutes, but not all sleep cycles are the same length of time during the night. The length of sleep cycles varies throughout the night. Typically, the first cycle lasts 70 to 100 minutes. Subsequent sleep cycles are longer, lasting 90 to 120 minutes.
Source: https://vtcnews.vn/con-nguoi-ngu-bao-nhieu-la-du-ar907849.html
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