With all civil designs I have seen, it is essential to have heels firmly on floor during take-off. If braking is needed, it takes an instant to raise the feet to press the toe brakes, with minimal movement of the rudder.
I was copilot to a pilot who twisted himself around in his seat to apply strong rudder on take off on a big jet in a powerful crosswind. Unbeknown to all of us, it inadvertently lifted that foot off the floor. To all our consternation, we were heading towards the side of the runway (09R) unable to get back towards the centreline. We wold have run off but Stop was called at 120 kts. He wasn't aware that his foot was off the floor and also pushing the toe brake. Keep them heels firmly on the floor! Why do you think the floor is so highly polished?