Quoting this here, because sometimes I need the reminder that I don’t control my sleep needs.
S]ocietal pressure [to go short on sleep], what nationally recognized sleep expert Dr. Mark Mahowald calls “the pervasive, erroneous attitude that sleep is not a biological imperative, that it is negotiable. We have raised sleep deprivation to a badge of honor.” […]
Most adults need seven to nine hours of sleep a night. The amount a person needs is genetically determined, Mahowald said. “Some people might need four hours on the short end, up to 10 on the high end. We have absolutely no control over this.”
Anyone who uses an alarm clock ”is by definition sleep-deprived,” Mahowald said, “because if the brain had received the amount of sleep it wanted, you would have woken up before the alarm went off.”
– from “We are a sleep-deprived nation”
I don’t always control when I’m sleepy or how much sleep I need. But I do know that not getting enough sleep is the easy way to induce depression symptoms in myself.