Pro tip: I swapped my hard kitchen chair for a padded one and my back stopped hurting in 2 weeks
I work from home and sit for about 9 hours a day at my desk. For 3 years I used a plain wooden chair because it looked nice, and my lower back ached every evening. Two weeks ago I got a padded chair with a slight curve in the seat, and the ache is mostly gone already. Now I get why people here care so much about how a chair feels over a full workday. What seating change made the biggest difference for your long desk days?