Mick Schumacher has become the latest driver to complain of back pain following a brutal Azerbaijan Grand Prix weekend.
The Haas driver struggled to impose himself on the race, eventually finishing 14th out of 15 finishers in Baku having started at the back of the grid.
A small number of drivers, led by George Russell and Lewis Hamilton, have been complaining of experiencing discomfort from the vigorous porpoising affecting select cars on the grid - the Mercedes drivers suggesting tweaks in the rules may be needed.
Pierre Gasly also added his voice to the concerns, suggesting drivers could be forced to use a walking stick or cane in their 30s if a solution wasn't found.
Mick Schumacher on Baku pain
It seems Schumacher is the latest to have felt the strain, explaining: "My back hurts a bit, it is not the weekend we were hoping for but from Saturday onwards it was kind of clean so that is good.
"But anyway, once you get to Saturday it is kind of difficult to judge whether the set-up was right or not and we only had one free practice to do that and unfortunately the set-up wasn't right so yeah, we were stuck with it until race end."
Haas 'not ideal' in Azerbaijan
Detailing where the VF-22 was lacking in comparison to its rivals across the weekend, Schumacher added: "Well it felt very understeery in the corner and then oversteer on exit so it was not ideal.
"We are using the tyres quite a lot and I think until the last stint, it wasn't great but then the last stint actually felt quite ok."