10/07/2025
https://www.facebook.com/share/p/1A7unFSSJw/?mibextid=wwXIfr
You might think of your bones as permanent scaffolding, but they are alive, dynamic, and constantly changing. Specialized cells called osteoclasts break down old bone, while others called osteoblasts build new bone in its place. This cycle, known as remodeling, happens every day in your body.
The scale is remarkable. By the time you are a young adult, you have already replaced the skeleton you were born with. And across your life, your bones will completely renew themselves roughly once a decade. That means the skeleton you have at 40 is not the same one you had at 30, and the skeleton you carry at 70 will have been rebuilt several times.
Bone remodeling is not just maintenance. It is how your body repairs tiny cracks and strengthens itself in response to stress. Athletes, for example, develop denser bones in the limbs they use most. Astronauts in space, without the stress of gravity, lose bone mass unless they exercise constantly.
This constant rebuilding is also why nutrition and activity matter so much. Bones are a living bank of calcium, phosphorus, and protein, and the quality of what you eat and how you move directly shapes their strength.
