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Effect of exercise on bone density and body composition during lactation

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Heather Lynne Kennedy (Creator)
Institution
The University of North Carolina at Greensboro (UNCG )
Web Site: http://library.uncg.edu/
Advisor
Cheryl Lovelady

Abstract: "Bone mineral density (BMD) decreases during lactation, therefore, the purpose of this study was to examine if exercise could slow this loss. Women were randomized to either an exercise group (EG, n=5) [aerobic (3d/wk, 45 min/d) and resistance exercise (3d/wk)] or control group (CG, n=6) (no exercise) during the 16 wk study. Body composition and BMD were measured by dual x-ray absorptiometry at lumbar spine (LS), hip, and total body. Significant differences in change from baseline between CG and EG were observed for LS bone mineral content (BMC) (-7.4 ± 2.4 vs. -2.9 ± 1.0%, p<0.01) and LS BMD (-6.9 ± 1.9 vs. -4.6 ± 1.1%, p=0.03), respectively. LS area increased by 1.8 ± 1.2% in the EG vs. a decrease of -0.6 ± 2.7% in the CG (p=0.09). No significant differences in percent change were seen in total body BMD and total hip BMD. EG women lost more fat mass (-2.1 ± 2.9 vs. -1.5 ± 1.7 kg) and less lean body mass (-1.0 ± 1.2 vs. -1.9 ± 0.8 kg), however these changes were not significant. These results suggest that resistance and aerobic exercise slow BMC loss and increase bone area of the LS resulting in less loss of BMD during lactation."--Abstract from author supplied metadata.

Additional Information

Publication
Other
Language: English
Date: 2006
Keywords
Bone mineral density (BMD), decreases, lactation, exercise, loss
Subjects
Lactation--Physiological aspects
Exercise for women--Physiological aspects
Bone densitometry