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Dwayne Johnson has previously spoken about his love of hitting the gym before the sun comes up. Photo: Dwayne Johnson / Instagram
Dwayne Johnson has previously spoken about his love of hitting the gym before the sun comes up. Photo: Dwayne Johnson / Instagram
Benefits and drawbacks of early morning exercise
A-listers swear by it, but does putting in work when it's dark add extra spark to gym sessions? Here's what the experts think