[ayoubElk]

I'm personally suffering from back pain when staying in the same position for prolonged periods of time (working, sitting somewhere, laying down).

Work wise, I've tried many chairs, which evidently were not all the most ergonomic, but what I noticed was that it's mainly caused by weak core/back muscles.

So I just want to mention that an ergonomic chair wouldn't be a solution by itself if you're in the same situation as me, strengthening your core should be a very important thing to take into account as well.