Our point that you're missing is: yes, people can train themselves to shift their sleep +/- a few hours, but people are biologically wired to have certain "chro

Our point that you're missing is: yes, people can train themselves to shift their sleep +/- a few hours, but people are biologically wired to have certain "chronotypes" that you cannot "will" yourself into defying. I woke up at 6 AM for six years, and I never "adjusted." I don't feel well-rested unless I sleep until 10 AM.