Is it enough for a 50-year-old woman to sleep only six hours a day?

Hello! People's sleep time decreases with age. The specific time can refer to the following table:

Data description: Assuming the age is X, the optimal sleep time y approximately satisfies y = 2 1-6x 0.3+x/ 10. However, some experts have suggested that the elderly need longer sleep time than adults because of weak qi and blood, so there is y = 22-7x 0.3+x/5.6. In this function, the sleep time of people over 60 years old is increasing.

References:

Baidu Encyclopedia "Sleep Time" Entry

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