[clooless]

Yes. I need 7.5 hours/night to have sufficient energy to be productive, but usually get 6.5-7. I sleep extra hours over the weekend and this resets me back to where I need to be feeling. Sundays are amazing.

It's true that what I feel doesn't count towards proving a scientific fact for other people, but I don't see why it can't prove it for myself. After all, people's bodies occupy a broad continuum when it comes to how they operate, and scientific studies generally stipulate that their conclusions aren't true for everyone.