Bones are active, living tissue. Similar to muscles, bones get stronger when we put stress on them with impact activities like walking, jumping rope, running, and weight training. When you strike the ground with your foot or flex a muscle, electrical impulses are sent through the bones and stimulate bone building cells. These important bone building cells are called osteoblasts. They are the bone builders that respond to load.
Bones need load or impact to respond. High impact activities like jogging, tennis, jump roping and weightlifting provide the kind of “surprise” that the bones react to the best. Lower impact activities, like walking, can help maintain bone mass, but will not have the same effect as higher impact activities.