Felipe Massa has revealed that he has not embarked on a weight-loss programme ahead of the 2011 season.
Many drivers, including Massa's Ferrari teammate Fernando Alonso as well as Rubens Barrichello, have said they are losing weight before having to race heavy KERS systems this year.
"I think I am the lightest driver on the grid so I don't have to worry about it as much as some of the others," Massa, who is believed to weigh less than 60kg, is quoted by Spain's Diario Sport.
As for the fact that he used Ferrari's KERS system in 2009, Massa denied that this will prove an advantage for him over Alonso, who joined the Italian team only last year.
"In 2009 I used the Ferrari and Fernando used the Renault (KERS), which was the same," said the Brazilian, referring to the fact that the basis of both systems was designed by Magneti Marelli.
"And I only used it for half a season, until my accident in Hungary," he added.