ABSTRACT
Every object has a center of gravity and for bodies of uniform density (where density is defined as the mass per unit volume) the center of gravity is at the geometric center of the object. However, for bodies with non-uniform density the center of gravity has to be calculated. As we know the human body has nonuniform density and it is an irregular shape and it assumes many different positions during sport and movement. Hence, the center of gravity may be constantly moving (although it can also be stationary). This center of gravity position can be either within or outside of the body. For example, in the high jump athletes often allow the center of gravity to move outside of the body so it can pass under the bar while the athlete travels over the bar. Fig. C4.1 shows some of the considerations for the center of gravity in more detail.
