body mechanics, 1. the field of physiology that studies muscular actions and the function of muscles in maintaining body posture. Knowledge gained from such studies is especially important in the prevention of injury during the performance of tasks that require the body to lift and move. 2. the application of kinesiology to the use of proper body movement when engaged in daily activities. The goal of proper body mechanics is the prevention and/or correction of problems associated with posture and with the performance of tasks that require the body to lift and move.
