But people can fall for numerous reasons. The Mechanics of Walking The study of energy, as applied to motion, is called kinesiology. Kinesiology provides us with a model to understand normal and abnormal movement patterns. Any movement, from a golf swing to a child climbing a flight of stairs, can be analyzed. Most movements involve the expansion and contraction of muscles in relation to joints and bones.
People use levers to move their bodies.
When we understand the patterns in which these levers work, we can determine the cause of deformities and incapacitates of a person in an accident. We cannot assume, however, that abnormal patterns of movement are responsible for an accident. Walking and most other motions of the whole body involve the body's center of mass. While complex measurements are necessary to determine the exact location of the center of gravity, it is estimated that the COG in the average person who is standing is about 55 percent of the distance between the floor and the person's height. This COG is located in the center of the body, as viewed from the side.