Jenson Button has urged the FIA to increased the minimum weight for next car as there are fears that it will penalise taller drivers.
As of next season, the minimum weight will be increased from 642kg to 690kg. However that added weight it to cover the new V6 engines and the Energy Recovery Systems.
According to reports some teams are already struggling to get near the 690kg, prompting fears that taller heavier drivers may be excluded from race seats in order to keep the weight down.
"I'm 74, 74.5 kilos with my kit and I struggle to meet the weight limit - I have done for the last three years," Button revealed.
"There's certain fitness training that I have to do and parts that I can't do: I can't build muscle; I can't eat carbohydrates because I have to be a set weight.
"It's going to get worse next year as well. Next year, I don't think any team will have any ballast really on the car. It is very tricky for a taller driver.
"It's not that it hurts you over a lap because you set the car up around yourself. But you lose a lot of tools to adjust the car - you can't move the weight distribution because you're so limited."
He added: "Every year, we start the season with ballast. Throughout the year, because you add parts to the car, the car puts more weight on," he said.
"Whereas at the start of next year, I think every team is not going to have ballast on the car - and it's only going to get worse during the season.
"It does hurt the heavier drivers and it's very unfair to say we'll lose weight, because some of us can't lose any more weight; you need to have skin on your bones and a little bit of muscle to drive a Formula 1 car.
"People don't realise the difference a kilo of weight can make, even if it is to change the balance of the car. It's 30 milliseconds per kilo and around most circuits ten kilos is about three tenths per lap.
"If you're four kilos overweight, it's a lot. It's almost two tenths."
Button and his fellow drivers are set to discuss the matter during this weekend's Grand Prix Drivers' Association meeting in Korea.
"It should be easy for us to stick another ten kilos of weight on the car; I don't understand why we can't talk about that. But maybe it's because we haven't talked about it - we haven't asked for the cars to be heavier," he added.
"It's one of the easiest things to put right. It could save a driver's career."
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