The bones of the human skeleton that perform a lot of physical work have thickenings, bumps and

The bones of the human skeleton that perform a lot of physical work have thickenings, bumps and other structural features. How do you explain this?

The fact is that bone is a living organism and under the influence of environmental factors it can change, “adjust” to the requirements of the environment. Of course, these changes occur within limited limits.

Muscles are attached to the bones. If a muscle does a lot of work, increases in mass and size, then this entails an increase in the load on the bone, which is its support. In the place where the muscle attaches to the bone, local, local growth of the bone occurs, the division of bone cells. Emphatically pronounced outgrowths are formed: tubercles, lines, etc. – the shape of the outgrowth depends on the shape of the muscle tendon attached to it.