In many fields it's well known that sleep/wake up time determines when your performances peak. In top-flight soccer, players adjust their sleep and training sc

In many fields it's well known that sleep/wake up time determines when your performances peak. In top-flight soccer, players adjust their sleep and training schedule so their body peak at afternoon matches in the weekend. And when they have out-of-schedule matches, especially to another city with large time difference, their performances drop. I also remember reading a book by a successful negotiator, that he tries to schedule the important meetings at 6PM, because morning people are generally not as sharp at that time as they are in the morning, while he is still fully functioning due to his late-rising habits. The not so exciting conclusion: early-bird performs best in the morning to early afternoon, late-riser performs best in the late afternoon to evening.