You need to absorb the Calcium to get the benefit. That's one of the reasons why nutrition can be so confusing - getting the nutrients in the body doesn't mean you're going to benefit from them.
This point goes to the heart on any discussion about nutrition and disease. My previous post were an attempt to demonstrate that exercise type, in and by itself was not a determining factor in bone health.
The "problem" is that different people have endocrine systems that respond differently to continuous activity. These differing hormonal responses to exercise are the reason why people will lose or absorb minerals at differing rates.
Long term studies support the idea that some activity contributes to bone health while
too much activity hastens loss of bone density or mineral loss. The same can be said for the positive or negative aspects of metabolism related to mineral supplementation.