I have an excellent older padded office chair. It has a seperate padded back that moves with me when I go forward or back with a strong support bar, is on wheels, and adjusts the height and has no arms. IMO many office chairs do not support the back unless you go high-priced. Many companies are down-sizing and on local craigs list we found excellent stuff for our business at bargain prices. Caution- check your posture when sewing-I have to make sure I don't hunch over my machine. I use 2 rubber door stoppers to raise up back part of my machine so it's angled and I avoid bending to see.