I used to hurt a lot more when sitting and piecing or quilting! I had hubby purchase a new chair for me. It has so many adjustments I love it. I have 2 sewing machine tables and I can adjust the height for piecing and quilting. I try to remember to relax the shoulders then I sew for hours. I have severe arthritis and yes getting up is painful. I do try to move more since I hurt when I get up. I say get a new chair. I know it has helped me so much!
Luann