Ever since the invention of the electric light, our obsession with “daylight capital” has eroded our respect for the original and most natural form of recreation: sleep. But sleep is something we desperately need to succeed in any endeavour – not least of all in getting to the top of the corporate heap.

“Like everything in life, sleep is a question of knowing what your body requires,” says Geldenhuys. “Once you understand sleep and the role it plays in your success or lack of it, you`ll be able to make smart choices.”