How many hours does a person need to sleep for the rest to be considered adequate?
Human factor: Physical factors
Explanation
To ensure **adequate** rest and avoid **drowsiness**, it is important to sleep between **7 and 9 hours**. Sleeping less than usual or changing sleep hours can cause drowsiness, which is dangerous when driving. Drowsiness manifests with symptoms such as tiredness and heaviness in the body, and it is a common factor in many traffic accidents. Therefore, sleeping 7 to 9 hours helps maintain an adequate state of alertness and reduces the risk of accidents at the wheel.
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