How your body is organised while you sit carries high importance, for your overall posture and overall health of your musculoskeletal system. If you are workin at the office all day. You should apply the instructions below in order to avoid back pain and improve your posture. The top of your screen should be at your eye level. The chair should completely support your thighs. Moreover it shoul have a backrest that supports your lower back. Position of your legs is also important, they should be bent in a 90-to-110 degree angle. Feet should be flat on the floor. Forearms should should be parallel to the floor. These are not 100% musts. Do as much as possible.