At 5 a.m., with the vibration of her Wristband, Dong Chengling woke from her sleep.
She rubbed her temples and, with her eyes closed, assessed her status. I can continue to shorten my sleep duration; I've slept a little too much, she thought.
Sleep is very important. It is not only a vital physiological activity to soothe the nerves in the brain, but also because metabolic byproducts in the brain can only be absorbed by the cerebrospinal fluid and metabolized in the plasma during sleep.
Therefore, chronic sleep deprivation can lead to brain damage.
