Barack Obama, Tim Cook, Richard Branson and Anna Wintour are just some of the world’s most renowned figures who start their day before the crack of dawn – and they credit their success to it. But can it really make you more alert and productive and, ultimately, help you achieve your goals? And what would it take to be a committed member of this exclusive club? Andrea Heng speaks to Dr Stijn Massar, Research Assistant Professor, Sleep and Cognition Laboratory, Yong Loo Lin School of Medicine, NUS, to find out more. 

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