Changes in soft tissue composition are the primary predictors of 4-year bone mineral density changes in postmenopausal women |
| |
Authors: | L A Milliken E Cussler R A Zeller J-E Choi L Metcalfe S B Going T G Lohman |
| |
Institution: | (1) Department of Exercise and Health Sciences, University of Massachusetts Boston, 100 Morrissey Blvd, Boston, MA 02125, USA;(2) Department of Physiology, University of Arizona, Tucson, AZ 85721, USA;(3) College of Nursing, Kent State University, Kent, OH 44242-0001, USA;(4) Department of Nutritional Sciences, University of Arizona, Tucson, AZ 85721, USA |
| |
Abstract: | Summary Changes in body weight influence bone mineral density, but the role of body composition is not clear in postmenopausal women.
Body weight and soft tissue composition predicted bone changes independent of calcium supplementation and exercise frequency,
indicating that soft tissue composition should be measured in clinical trials.
Introduction The purpose of this study was to examine the relationship between changes in body weight and composition and changes in 4-year
bone mineral density (BMD) after accounting for age, 4-year exercise frequency (EX), and 4-year calcium supplement intake
(CA) in postmenopausal women with and without hormone therapy (HT).
Methods Postmenopausal women (aged 40–65 years) either using HT (for 1–3.9 years) or not using HT (for ≥1 year) were recruited to
the study. EX and CA was monitored throughout the study and 167 women completed 4 years. BMD and soft tissue composition measurements
were made using dual-energy X-ray absorptiometry. Regression was used to predict 4-year BMD changes from EX, CA, age, baseline
and 4-year changes in body weight and composition. HT users (n = 115, 55.3 ± 4.3 years) and non-users (n = 52, 57.5 ± 4.7 years) were analyzed separately.
Results The models predicting regional BMD changes that included soft tissue composition changes explained the most variation compared
with those with body weight or EX and CA alone. Larger amounts of variation in BMD changes were explained in the no HT group.
Conclusion Body composition changes are important positive predictors of BMD changes independent of EX and CA supplementation, but their
contribution varies according to bone site and with HT use. |
| |
Keywords: | Calcium Exercise Fat mass Hormone therapy Lean mass |
本文献已被 SpringerLink 等数据库收录! |
|