Hamilton is down a shirt size but says new F1 is less demanding 24 March, 2014 Lewis Hamilton Mercedes driver Lewis Hamilton revealed that he has dropped down a shirt size in his efforts to be in peak condition to drive the new V6 turbo Formula 1 cars, which he says are not as physically demanding as their predecessors. Speaking at a Petronas function in Kuala Lumpur ahead of the Malaysian Grand Prix weekend, Hamilton said, “The demand is now lighter on the driver. I have changed my shirt size as I have been regularly going to the sauna.” “The key to getting ready is, I think, to do more cardio sessions. I spent about five to six hours a day during the off-season to maintain my fitness. It is impossible to stay as fit when the season starts but I try my best to,” added Hamilton. Hamilton has 22 grand prix wins on his CV but he has never won at Sepang International Circuit, a fact that he intends to change. “I have not won at Sepang for Mercedes before and that is the goal for me this weekend. We showed what we are capable of in Melbourne and we hope to prepare the cars as best as we are able to at Sepang.” (GP247) Subbed by AJN. Content on GrandPrix247.com by: staff & contributors, Reuters syndication, GMM service, Getty Images, Formula 1 teams, sponsors & organisations.