This is not due to any sexist attitude but to my somewhat limited writing style. Balance and the awareness of oneself in space are skills that each individual spends his or her entire life developing. Whether the individual is aware or not, daily activities require that the human body move in space, dealing with forces that exist within each individual's environment. The most universal of these forces is gravity. From birth, the child begins to oppose gravitational forces by reaching and probing within the child's world.
Development eventually takes the body to an upright, erect standing position.
This is not something that is taught to the infant, but rather, it is through stages of physical and mental growth that the child eventually is able to stand and walk. Apart from athletics, our society typically leaves the mechanics of the human body to medical personnel. But, apart from doctors and athletes, there is someone who does have vested interests in the study of body movement - the performer. Before the performer can use his body as a tool for the performance, the performer must have a complete understanding of that tool and recognize all potentials and limitations. At the center of this neutrality lies the performer's power supply.