I observed a similar impact in performance during undergrad and developed a routine around the impact. I work a mentally intense 5hr stretch in the morning the

I observed a similar impact in performance during undergrad and developed a routine around the impact. I work a mentally intense 5hr stretch in the morning then take a 2hr break to have lunch, exercise, and shower. By the time I return to work, I'm completely refreshed and able to put in another 5hr stretch at peak performance levels.