There are 206 bones in the human body and they serve a number of important roles.

Our bones:
• Provide shape to our bodies
• Cause movement as muscles pull on them
• Support and protect our internal organs
• Store fat and minerals
• Produce and store red and white blood cells in the marrow
   that fills our bone cavities.

Our bones are constantly remodeling themselves. Specialized bone cells (called osteoclasts) remove small areas of old bone (process called: resorption) while other specialized cells (called osteoblasts) synthesize new bone in its place (process called formation).

This process of remodeling occurs throughout life with the building phase exceeding the breaking down phase until sometime between the ages of 25 and 30, when the bone mineral density peaks.

The greatest impact on BMD occurs before puberty . . . so exercising before reaching skeletal maturity is vital for maximizing BMD and preventing osteoporosis (which strikes both women and men — although women are more susceptible).

After our 30’s, the BMD decreases steadily every year and without strategies to keep the BMD intact, osteoporosis will gradually occur. The amount of physical stress our bones receive through exercise can keep our BMD high throughout life.

« back   |   next »

information resources: IDEA Health & Fitness Association and American Council on Exercise



Wellness Info  |  Fitness FAQs  | Seminars  | Policies  |  Home