Anders Ericsson, of the classic ten-thousand-hours study, found that master violinists slept eight and a half hours a night on average and took a nap most days. (A friend said of Churchill, “He made in Cuba one discovery which was to prove far more important to his future life than any gain in military experience, the life-giving powers of the siesta.”) According to Ericsson, great players nap more than lesser ones.
