Nitpick: “The former two have diminishing returns, but the latter does not.” It definitely does—I think getting 12 or 13 hours sleep is actively worse for you than getting 9 hours.
Hey, yep I think there’s more nuance there then I suggested. Still, as a rough rule, I find it best to sleep for as long as possible over the course of a week. Sleeping as long as possible for a day may not be optimal because then you may sleep less on the following day. But getting maximal total sleep over a week-long timeframe proves best for my mood and concentration.
I’m aware that some evidence shows a correlation between sleeping more than 8 hours and health problems, even controlling for confounders. My guess is that this link isn’t causal because it’s not clear what the mechanism is, and I think undiagnosed depression/other illnesses could be driving a lot of the association
CBT-I is also recommended in Why We Sleep (see my summary of the book).
Nitpick: “The former two have diminishing returns, but the latter does not.” It definitely does—I think getting 12 or 13 hours sleep is actively worse for you than getting 9 hours.
Hey, yep I think there’s more nuance there then I suggested. Still, as a rough rule, I find it best to sleep for as long as possible over the course of a week. Sleeping as long as possible for a day may not be optimal because then you may sleep less on the following day. But getting maximal total sleep over a week-long timeframe proves best for my mood and concentration.
I’m aware that some evidence shows a correlation between sleeping more than 8 hours and health problems, even controlling for confounders. My guess is that this link isn’t causal because it’s not clear what the mechanism is, and I think undiagnosed depression/other illnesses could be driving a lot of the association