Where is the center of gravity located when standing erect?

The center of gravity in an upright human posture is generally located anterior to the edge of the second sacral vertebra (S2). This position is influenced by the distribution of body mass and contributes to a person's stability. The location of the center of gravity plays a vital role in maintaining balance, especially when engaged in various activities and movements.

When a person stands erect, their weight is distributed in such a way that the center of gravity sits within the body's base of support, which is primarily formed by the feet and the area they occupy. Lying anterior to the S2 vertebra indicates that the gravitational pull effectively aligns with the body’s overall mass distribution, promoting stability. Understanding this anatomical landmark helps in assessing balance and postural control, which are critical in orthotics and rehabilitative practices.