Posture and Ergonomics
Posture is the position in which you hold your body upright against gravity while standing sitting or lying down. Good posture involves training your body to stand, walk, sit and lie in positions where the least strain is placed on supporting muscles and ligaments during sitting, movement or weight-bearing activities. Good posture prevents strains and injury to your muscles, ligaments and joints and thus prevents unnecessary pain and discomfort. Working or holding the body for too long in one position can cause overuse, injuries and poor appearance.
Ergonomics is the scientific study of people at work. The goal of ergonomics is to reduce stress and eliminate injuries and disorders associated with the overuse of muscles, bad posture, and repeated tasks.