The problem with conventional office seats is that your body must adapt to the chair and conform to its shape, which often messes with the alignment of your spine. The Swopper fixes this problem by promoting "active sitting." It was created over 12 years ago, making it way ahead of its time. How it works: Using 3-D technology, the chair allows unrestricted movement; you can move side to side, and forward and back smoothly. This helps improve your posture and exercise your muscles, which helps prevent back pain and joint problems. It may also help boost circulation and increase attentiveness. A few days of sitting on this chair were all we needed to feel the difference. It’s definitely one of the pricier options, but in our opinion, totally worth it.