Bone Structure and Physiology

Bone is a living tissue that is continually broken down and rebuilt, and it adapts its strength to the loads placed on it.

It forms the framework for movement, protects internal organs, houses the marrow and is the body's main store of calcium and phosphate.

For sport and exercise medicine (SEM), this biology explains why training strengthens the skeleton, why unloading and low energy availability weaken it, and how bone changes across a lifetime.