TY  - JOUR
T1  - EXercise and the regulation of bone mass
AU  - MARCUS R
Y1  - 1989/10/01
N1  - 10.1001/archinte.1989.00390100008002
JO  - Archives of Internal Medicine
SP  - 2170
EP  - 2171
VL  - 149
IS  - 10
N2  - It has become axiomatic that physical activity benefits the skeleton. This idea is supported by several lines of evidence, including extensive documentation of the often devastating consequences of immobilization and comparative data that show an association of increased physical activity with increased bone mass. The latter studies show that "active" or athletic subjects have significantly increased bone mineral density compared with that of sedentary controls, a difference that ranges from about 8% to 30%, almost without regard for the type of exercise.See also pp 2197 and 2325.Although one is tempted to conclude from these studies that activity itself increases bone mass, their cross-sectional nature leaves open the possibility of ascertainment bias. In most reports, "athletic" subjects must satisfy defined exercise inclusion criteria. A typical criterion might be to run 32 km each week for more than 5 years. Since most adults who initiate an exercise program stop training
SN  - 0003-9926
M3  - doi: 10.1001/archinte.1989.00390100008002
UR  - http://dx.doi.org/10.1001/archinte.1989.00390100008002
ER  -