Modeets.com has published new reviews of the latest design innovations of kneeling chairs and yoga ball chairs designed to bring people better posture and health while working in an office. San Francisco, CA, United States of America – February 5 Companies always seem to be trying to reinvent the office chair, and more unconventional options have been cropping up. We wondered whether, say, a fitness ball or a kneeling chair could reduce backaches and improve posture, so our editors put five chairs .