"Generally speaking Formula One drivers generate a lot of brake pressure. When they hit the brakes, they basically stand up on the brake pedal. As they brake at 4G, they will apply roughly four times their body weight to the pedal.
"At the same time brakes - like almost everything else in an F1 car - are highly customisable and depend very much on driver preferences. The brake pedal can be adjusted to how hard a driver usually hits the brakes as it works as a lever upon the master brake cylinder.
"So, if a driver feels that he has not enough power in his legs, the brake pedal can be manipulated to generate peak pressures more easily; however, this would also mean that the pedal will travel further. For that reason, training his legs is part of every driver's fitness programme.
How much does the braking point vary on a lap-by-lap basis? Are F1 drivers able to hit the brakes at the same time on every lap?
"The ideal braking point will change over the course of the race - depending on fuel loads, compound choice, tyre degradation and how much the drivers have to manage the tyres. So the drivers have to vary their braking during the race, keeping in mind all the parameters that influence it. In qualifying, the braking points stay more or less the same as the car goes out on similar amounts of fuel and on fresh rubber.
"If you look at telemetry overlays from qualifying, you can appreciate that the drivers are able to repeatedly hit the brakes at roughly the same spot. Usually, they will brake within a couple of metres or less; five or six metres are a significant difference. This is all the more impressive if you consider that a car that's going 330 km/h travels almost 92 metres in a single second. So being able to hit the perfect braking point is a matter of fractions of a second."