PSG are set to visit the chiropractor after bending over on Wednesday night for 90 minutes straight.
The French club did attempt to stand up at one point, but opponents Barcelona put paid to that and proceeded to bend them right back over.
A PSG spokesperson said: “Our back is very sore from Wednesday night. 90 minutes plus stoppages is a very long time to bend over for.
“To be honest, it isn’t just our back that is sore; other parts are incredibly sore too – but we don’t want to talk about that right now.
PSG have reportedly been in contact with Arsenal for advice, after the London club suffered similar problems after bending over for a full 180 minutes.