I've had more impact through planking and thoracic spine stretches than any chair could ever have (your own case will be different, of course)
The goal isn't to be able to sit still for hours on end, that's your body telling you to get up and move. But you should still be able to sit for generally without feeling uncomfortable.
Consulting a physio has been well worth it, just be prepared to invest some time each day in some targetted exercise as that's where the gains are.
I've had more impact through planking and thoracic spine stretches than any chair could ever have (your own case will be different, of course)
The goal isn't to be able to sit still for hours on end, that's your body telling you to get up and move. But you should still be able to sit for generally without feeling uncomfortable.
Consulting a physio has been well worth it, just be prepared to invest some time each day in some targetted exercise as that's where the gains are.