Any assumed attitude of mind will be reflected in an obvious, or a subtle corresponding attitude of the body. This is now a well known fact. The relationship has been known and utilized for centuries and applied in the traditional art of self development by those who adhere to the teachings and practices of Yoga. This system utilizes physical poses to help the mind, and applies mental attitudes to help the body.
Although there is a highly developed system based upon 84 classical yoga Asanas, as they are called, the simplest practice is fundamental. It is called Tadasana and represents the erect, upright mind and character, the confident individual whom we aspire to become. There is an associated physical discipline and muscular effort involved in standing upright, walking tall and sitting without slumping.