With the advent of KERS, Tony Dodgins wonders how much of an impact drivers' weight will have on performance and compares F1 to that other great weight-related sport boxing.

Something Robert Kubica said at the BMW launch got my attention. He was talking about the disadvantages of being a taller, thus heavier driver at a time when the added 30-45 kilos of KERS (Kinetic Energy Recovery Systems) becomes a reality in Formula One.

"Last year," he said, "I tried to lose weight and in the first half of the season I was maybe too light, I'd say." Kubica had dropped around six kilos and the implication was that the weight loss may have impacted on things such as strength, endurance and concentration.

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