The more you run, the denser your bones will be

Not for all of us. I have had osteoarthritis since I was a teenager. Doing too much aggravates the arthritis in my hip, leading to limited activity, which is not good for the bones.

http://www.eurekalert.org/pub_releases/2016-04/f-sf-tmy041916.php

Public Release: 19-Apr-2016
The more you run, the denser your bones will be
FECYT - Spanish Foundation for Science and Technology

Spanish researchers have analysed the effect of endurance running training on the stiffness index, a variable that is directly related to bone quality. The results confirm that the greater the race distance that is trained, the better; this can be used, therefore, to prevent the progressive decline in bone mineral density that occurs with age.

In healthy individuals, bone quality -chiefly determined by bone mineral density- depends on factors such as sex, age, race and diet. It can be modified, however, by making life style changes -for instance by doing regular exercise.

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