| Autor: |
Ulrich, Cornelia M., Georgiou, Constance C., Gillis, Dawn E., Snow, Christine M. |
| Předmět: |
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| Zdroj: |
Journal of Women's Health; Apr1999, Vol. 8 Issue 3, p365-375, 11p, 3 Charts, 1 Graph |
| Abstrakt: |
The article presents a study which investigated the relationship between measures of lifetime physical activity and bone mineral density in premenopausal women. Osteoporosis is a major source of premature disability among elderly people in the U.S. and millions of elderly women are affected by this disorder. Physical activity has been shown to maintain or increase bone mineral density (BMD), but there is little basis for conclusions about optimal exercise duration or frequency for maximum bone density. Although cross-sectional analyses indicate a positive effect of exercise on BMD, results from longitudinal studies are less consistent. These differences may reflect selection bias or the effects of timing and nature of the physical activity investigated. In recent years, physical activity before adulthood has become an important dimension of osteoporosis research. Several cross-sectional and longitudinal studies observed associations between physical activity levels during childhood, adolescence or young adulthood and BMD at various sites. The relationship between lifetime physical activity and BMD of the total body skeleton or larger skeletal areas has not been investigated. |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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