Warren Buffett, Richard Branson, and Satya Nadella feel their hobbies make them more successful. Science says they’re right

Microsoft CEO Satya Nadella says playing cricket taught him lessons about teamwork and leadership—put your team first, and bring out the best in other people—that have stayed with him throughout his career. Richard Branson says spending several hours a day doing physical activities he enjoys actually expands his day by making him more energetic and productive. Warren Buffett says playing bridge is “the best exercise there is for the brain,” since each turn for...