Bucking the current trend in F1, Sebastien Buemi has revealed that he has put on weight ahead of the 2011 season.
After a disappointing finish to last season, the Toro Rosso driver changed his chief mechanic and fitness trainer.
With new Finnish physio Antti Kontsas, the 22-year-old said he has put on three kilograms since the 2010 finale in Abu Dhabi.
Swiss newspaper Blick said the extra weight is muscle bulk.
"I am now 66 kilos," said Buemi, who is 175 centimetres tall.
"In Bahrain, I have to be ahead of Alguersuari in qualifying and the race," he said, amid reports he is under serious pressure from Toro Rosso’s new Friday driver Daniel Ricciardo.