“Those who research world-class performance focus only on what students do in the gym or track or practice room. Everyone focuses on the most obvious, measurable forms of work and tries to make these more effective and more productive. They don’t ask whether there are other ways to improve performance, and improve your life.

This is how we’ve come to believe that world-class performance comes after 10,000 hours of practice. But that’s wrong. It comes after 10,000 hours of practice, 12,500 hours of deliberate rest, and 30,000 hours of sleep.”

(Alex Soojung-Kim Pang)