Ferrari driver Carlos Sainz wants a wider debate on the impact that designs of modern Formula One cars are having on driver health.
Constructors in the series have taken steps to counteract the impact of 'porpoising' (or bouncing of the car) brought about by new aerodynamic rules, including making suspensions stiffer.
The rule changes were brought in with the intention of increasing opportunities to overtake, but one of the impacts of that has been the extra 'porpoising'.
Sainz, who sits fifth in this season's driver standings, has been in Formula One since 2015 and says he can already feel the toll taken on his back and neck.
Asked prior to this weekend's Spanish Grand Prix how the issue may be particularly prominent on the street-race of Monaco at the end of this month, Sainz said: "It's more than Monaco.
"How much toll should a driver pay for his back and his health in an F1 career with this kind of car philosophy?
"I think we need to open the debate more than anything.
"I think the regulations are great. They're doing exactly what we needed for racing. But do we need to run as stiff for our necks and back as we are having to run lately?
"I've done my usual checks on my back, neck tightness, and I see this year I'm tighter everywhere.
"I don't need expert advice to know that 10 years like this it's going to be tough, and you're going to need to work a lot in mobility, flexibility."
McLaren driver Lando Norris, a former team-mate of Sainz, offered suggestions to limit 'porpoising'.
"I would have thought you'd have much worse effects from crashing a car at 50 or 60G like some of us have done," Norris said.
"There are also many ways for them to stop porpoising. Like lifting your rear ride height 20mm."