2. Firstly we need to establish that warming up and flexibility are not the same thing. The aim of warm up stretches primarily is to prevent injury and prepare for movement. Flexibility refers to the range of motion about a joint and flexibility training aims to improve the functional range of movement. All human movement is effected when nerve impulses stimulate a muscle group into action. This action is limited by the range of movement (ROM) the muscles are restricted to, due to the structures within a joint such as the bones, muscles, ligaments, tendons and the overlying skin. Most of these are elastic to a greater or lesser degree and therefore their ability to stretch can be improved with proper flexibility training