In this tutorial, we learn how to avoid back pain from sitting at a desk at work. You can sit safely by keeping your back locked and using variations. Change position regularly and stand upright while moving. This will change the pressure in the disks in your back. Alternate between active and passive sitting, which will let your back muscles work. You can lean against the back rest of your chair for support on the hollow of your back. The position of your feet and legs has an impact on your posture as well. When you place your feet under the chair, you assume an active position more easily. The pelvis should tile forward and your back should be forward.