Posture is the way in which you hold yourself while sitting, standing, and lying down. Good posture keeps all of your joints and bones aligned, reducing stress on muscles and ligaments.[1] Maintaining good posture is important to prevent muscle fatigue and injury. Poor posture often leads to back pain, but there are several small changes you can make to your daily routine to prevent this by improving your posture. Seek expert advice before and after these changes to prevent injury.