Is it really true that 7 hours of sleep is the sweet spot?

I once read somewhere that 7 hours is optimal, but for me, sleeping 8 hours actually makes me sleepier, and when I sleep 6 hours, I'm dying by the afternoon.

From what I heard at the hospital, the amount of sleep each person needs varies, and what matters is keeping your wake-up time consistent. They said sleeping in on weekends actually disrupts your rhythm.

Has anyone here felt better after adjusting their sleep duration? If you have any tips, please share them.

by 클라우드러버68