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Bone mineral density, bone remodelin...

Milliken, Laura Ann.

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Bone mineral density, bone remodeling, insulin-like growth factors, hormone replacement therapy, and exercise training in postmenopausal women.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Bone mineral density, bone remodeling, insulin-like growth factors, hormone replacement therapy, and exercise training in postmenopausal women./
作者:	Milliken, Laura Ann.
面頁冊數:	122 p.
附註:	Director: Timothy G. Lohman.
Contained By:	Dissertation Abstracts International59-09B.
標題:	Biology, Animal Physiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9906515
ISBN:	059904196X

Bone mineral density, bone remodeling, insulin-like growth factors, hormone replacement therapy, and exercise training in postmenopausal women.
Milliken, Laura Ann.

Bone mineral density, bone remodeling, insulin-like growth factors, hormone replacement therapy, and exercise training in postmenopausal women. - 122 p.

Director: Timothy G. Lohman.

Thesis (Ph.D.)--The University of Arizona, 1998.

Osteoporosis is a condition of reduced bone mineral density (BMD) resulting in an increased susceptibility to bone fractures. The purpose of this study was to determine the effects of 12 months of weight bearing and resistance exercise on BMD, bone formation, measured by serum osteocalcin (OC) and bone resorption, measured by urinary excretion of deoxypyridinoline crosslinks (Dpd), in 2 groups of postmenopausal women who were either taking or not taking hormone replacement therapy (HRT). Secondary aims were to characterize the changes in insulin-like growth factors-l and -2 (IGF-l and -2) and IGF binding protein 3 (IGFBP3) in response to exercise training, and to determine the contribution of these growth factors in predicting changes in bone mineral density in the 2 populations of postmenopausal women.

ISBN: 059904196XSubjects--Topical Terms:

1017835
Biology, Animal Physiology.

Bone mineral density, bone remodeling, insulin-like growth factors, hormone replacement therapy, and exercise training in postmenopausal women.
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245 1 0 $a Bone mineral density, bone remodeling, insulin-like growth factors, hormone replacement therapy, and exercise training in postmenopausal women.
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520 $a Osteoporosis is a condition of reduced bone mineral density (BMD) resulting in an increased susceptibility to bone fractures. The purpose of this study was to determine the effects of 12 months of weight bearing and resistance exercise on BMD, bone formation, measured by serum osteocalcin (OC) and bone resorption, measured by urinary excretion of deoxypyridinoline crosslinks (Dpd), in 2 groups of postmenopausal women who were either taking or not taking hormone replacement therapy (HRT). Secondary aims were to characterize the changes in insulin-like growth factors-l and -2 (IGF-l and -2) and IGF binding protein 3 (IGFBP3) in response to exercise training, and to determine the contribution of these growth factors in predicting changes in bone mineral density in the 2 populations of postmenopausal women.
520 $a Women who were three to ten years postmenopausal and aged 40-65 years were included in the study. Women in HRT and no HRT groups were randomized into the exercise intervention resulting in four groups: (1) women not taking HRT, not exercising; (2) women taking HRT, not exercising; (3) women exercising, not taking HRT; and (4) women exercising, taking HRT. The number of subjects per group after one year was 27, 21, 25, and 16, respectively.
520 $a Exercise training and HRT increase BMD similarly at most BMD sites whereas the combination of exercise and HRT produced increases in BMD greater than either treatment alone. Bone remodeling was surpressed in the groups taking HRT regardless of exercise status. The bone remodeling response to exercise training in women not taking HRT was not significantly different from those not exercising but the direction of change suggests an elevation in bone remodeling in response to exercise training. Exercise training does not stimulate a change in IGF-1, IGF-2, IGF-1:IGF-2, and IGFBP3. Markers of bone remodeling and IGF-1 are significant predictors of BMD changes but the overall amount of variation in BMD changes accounted for is low. Exercise and HRT status were significant predictors of changes in BMD even after accounting for variation due to bone remodeling indicating that bone changes are regulated by factors not addressed in this study.
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