Formula One legend Jenson Button has put on 11kg since hanging up his racing gloves , with the 46-year-old immersing himself in the world of Hyrox. The 2009 F1 world champion tackled his first solo Hyrox event in Phoenix, Arizona, at the beginning of February following a remarkable body transformation that now sees him resembling a WWE superstar more than an F1 driver. Button has exchanged the thrill of the race track for a running circuit thanks to the increasingly popular sport , which sees