Having arthritis in my back prevents me from sitting at my desk for more than an hour at a time. With my new chair I don't have the difficulty. Two hours elapsed while I worked on a project and I didn't realize it since I had no pain no need to readjust in the chair or get up for a brief walk. I bragged about the Sorina to my husband that he purchased one also. Now he can work at his desk in comfort too. Definitely recommend this chair.