Introduction to biomechanics of movement
The capacity of the body to move and carry out all of the activities that constitute daily living depends upon the capacity of the musculoskeletal system to generate and transmit forces. The forces generated and transmitted by the musculoskeletal system are referred to as internal forces. Body weight and the forces that we apply to the external environment are referred to as external forces. Internal forces change the position of the body segments relative to each other, but it is the resultant of the external forces that determines the movement of the body as a whole. The purpose of this chapter is to review the concepts of force, mechanics and biomechanics, describe the two fundamental forms of motion, and describe the units of measurement used in the study of biomechanics.