Following the reinsertion of KERS for next season, both Rubens and Fernando agreed to lose weight.

As next year cars are heavier, drivers now must face the consecuenses. Alonso stated he wants to lose at least 2 kg before Bahrein. Rubens has a harder task, keen on loosing about 7 kg (almost as much as Robert Kubica had by 2009, when KERS made it's debut).

(article in spanish)
http://www.corsaonline.com.ar/2010/1...on-de-peso.php