OBJECTIVES: To investigate the relationship between the body composition and regional bone mineral density (BMD) in postmenopausal women according to years since menopause (YSM). METHODS: A total of 167 postmenopausal women with a mean age of 62.91 ± 5.09 years participated in this cross-sectional study. The average YSM was 11.96 ± 6.28 years. We used the DXA Lunar Prodigy Primo(™) device to assess the body composition parameters [body fat mass (BFM) and lean body mass (LBM)] and the BMD of the lumbar spine, proximal femur and total body. RESULTS: The LBM was a stronger predictor of the proximal femur BMD than BFM in 1-10 YSM category, whereas the BFM was a stronger predictor of the proximal femur BMD than LBM in 11-20 and 21-30 YSM categories. The BMD of the lumbar spine showed a similar trend. A significant relationship was found between BMD of L(1)-L(4) and LBM in 1-10 YSM category (r = 0.26; p < 0.05). BFM was significantly associated with BMD of L(1)-L(4) in 11-20 YSM category (r = 0.25; p < 0.05). Significant relationships were found between total femur BMD and LBM in 1-10 YSM (r = 0.27; p < 0.05) and 11-20 YSM category (r = 0.25; p < 0.05). BFM was significantly associated with total femur BMD only in 11-20 YSM category (r = 0.40; p < 0.05). CONCLUSION: The relationships between BMD and body composition are dependent on YSM and vary between selected segments.

Department of Natural Sciences in Kinanthropology Faculty of Physical Culture Palacký University Olomouc Olomouc Czech Republic

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Relationships between bone mineral density, body composition, and isokinetic strength in postmenopausal women