1 study says your sleep a lot because your depressed and a 2nd says your depressed because you sleep a lot. What?

So the 1st study says kinda suggests that if you get over your depression you wont need to sleep so much.
But the 2nd suggests, that if you set you alarm clock for 1 hour shorter then you normally would. you wont feel depressed.

🤷🏼‍♂️ I'm confused, which is it?

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Renaci · 36-40

Both. That's why it can form a vicious cycle. But sleep deprivation can boost mood temporarily. Probably from just being wigged out on lack of sleep.
Also sleeping more during depression can be a secondary effect. It could actually as an escape mechanism to avoid a painful waking state. So it will be different for each person and even then can be complex even within that individual.