I've been hearing mixed advice on the topic of optimal sleep. Serge Faguet's article on biohacking suggests that waking up at the same time everyday, regardless of the time you sleep, is key to optimal rest.
On the flip side, Dr. Matthew Walker on Joe Rogan Podcast 99% of us need 7-9 hours, always.
My question is, after a late night out, am I doing more to help my body by waking up at the same time everyday, or to sleep in?