After a recent karting foray with his mates, Romain Grosjean walked away from the day's action more tired than when he does a grand prix in his Haas Formula 1 car. Speaking to Motorsport Network, Grosjean said in a recent interview, 'I went karting with my friends using a 125cc gearbox and I was more tired than doing a Formula 1 race.' 'Why? Because you push all the time, you don't play safe. And most importantly [in F1] we manage the tyre all the time. At Barcelona, it feels like you are driving at 40% or 50% of the capacity of the car, and it's not hard.' 'If it was only qualy laps, you would push as hard every lap and then you'd be completely fucked by the end. You'd be tired. If we had...
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