Austin track bumps out of control - Verstappen

The track is built on former marshland and that has made it difficult for organisers to keep it in good condition, but the four-time champion rejected that as a reason not to try to solve the issue.

"You can use the excuse that the soil is the problem but then you should have known that and you need to make sure that you reinforce it more," Verstappen said.

"Last year, for example, you pull around 5-6G in a corner, but I had some impacts, vertical load, which was over 9G on my spine, which I can tell you is really not fun, and especially the older you get, you think about that more and more."

Verstappen said the problem was likely to be exacerbated this year because although the cars from 2022-25 had lower ride-heights overall, the way the cars are run under the latest regulations means they are running lower in corners than last season.

That's because of the switch between having the front and rear wings open in drag-reduction mode on the straights and closing in corners means the cars drop down towards the ground when they brake.

"You bottom out way harder, because when the wings close and the ride-height comes down, under braking is actually a very stressful moment, and I know around here in some places, it's very bumpy under braking," he said.

"Especially when it's like these kind of awkward bumps, not just bumps from the track getting older, but the surface underneath the soil just moving up and down, sometimes (it's) very hard to expect, or if you're like a tiny bit offline, you don't know what is there, because no-one really drives here sometimes.