|
How
Does Exercise Build Bone?
We strengthen our bones in very much the same way we
strengthen our muscles - through exercise! Walking,
running, and playing sports are all great ways to exercise.
Can you think of other ways to exercise?
When
we exercise our bone tissue deposits more of the mineral
salts that lend strength to our bones (osteoblasts).
However, if we don't exercise the exact opposite happens.
Bone-resorbing cells (osteoclasts) tear down the bone
because you aren't using it.
Exercising causes stress on our bones. This stress causes
calcium phosphate crystals to produce tiny currents
of electricity, which stimulate the bone-building cells
(osteoblasts) making bones thicker. This is called the
piezoelectric effect.
Exercise
also increases the level of calcitonin, a thyroid hormone.
This hormone stops the bone-resorbing cells (osteoclasts).
Anything
in excess is bad for your body, including exercise.
Research suggests that 20-30 minutes of moderate to
intense physical activity several times per week produces
a favorable skeletal benefit.
For
additional information:
Exercise
and Bone Health
Physical
Activity
Eight
Reasons to Exercise
All
About Exercise
|
