It has always been very difficult for me to find a chair that isn't a complete disaster either for my lower back pain or for my shoulder problems. After trying

It has always been very difficult for me to find a chair that isn't a complete disaster either for my lower back pain or for my shoulder problems. After trying a very large number of very expensive spaceship shaped chairs (Herman Miller, etc) I'm now pretty happy with IKEA's Alefjäll swivel chair: https://www.ikea.com/gb/en/p/alefjaell-office-chair-glose-black-30367460/ https://www.ikea.com/gb/en/p/alefjaell-office-chair-glose-bl... What this chair has going for it is that you can lower the backrest so that you can lean back over it. That takes a bit of weight off the lower back and leaves the shoulders free. There are a lot of cheap, flimsy office chairs that can do the same, but they mostly don't have armrests and are generally too small. The Alefjäll is very un-IKEA-like in that it has a very solid, even heavy, feel about it.