People will tell you all kinds of models but in the end it totally depends on you. You just have to try some. I needed years to finally find the right chair. I

People will tell you all kinds of models but in the end it totally depends on you. You just have to try some. I needed years to finally find the right chair. I did so at work. We can take an "ergonomics course" where we learn how sit and can try different chairs. I now have the exact same one at home because I love it. Another thing is: you most likely need to move more. Find a sport and do it regularly. You don't have to be especially good at it. Key is to have fun and do it regularly. I also had problems with sore legs over a long time. Not so much with a good chair but it still was there sometimes. This is often a circulation issue. - Sit correctly (adjust height of seat, keyboard, monitor etc => Youtube has guides for sure) - Stand up regularly and walk somewhere (fetch tea, coffee, water). You can even go outside for 5 minutes.. This will also benefit your eyes. - Do sports. You can even just do a stroll every day.. it will help. edit: spelling