How does the S-shaped vertebral column absorb shocks during walking?

The human vertebral column functions as a flexible, S-shaped spring that is essential for absorbing the shocks generated while walking on hard surfaces.12

If the spine were straight, these jarring impacts would be transmitted directly from the pelvic girdle to the head. The S-shaped curvature acts as a "doubly bent" spring arrangement, which effectively dissipates these forces and protects the column from potential fracture. Additionally, cartilaginous intervertebral disks located between the vertebrae further assist in cushioning these shocks during locomotion.13

Beyond shock absorption, this unique curvature helps distribute body weight, maintains balance in an upright position, and provides necessary space for the body's viscera.12