As the body continues to mature into later adulthood, several physiological shifts occur:

This topic explores how biological maturity and aging affect the human body, specifically focusing on the physical and structural changes that occur in the breasts and gluteal regions. The Biological Evolution of Form

The gluteal region is primarily comprised of the gluteus maximus, medius, and minimus muscles. As the body matures, a process called sarcopenia (natural muscle loss) can occur if not countered by physical activity. This can lead to a loss of volume and a change in the overall contour of the lower body. Cultural vs. Biological Maturity