Strength training effects on bone mineral content and density in premenopausal women

Meghan Warren, Moira A. Petit, Peter J. Hannan, Kathryn H. Schmitz

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Purpose: Mechanical loading, such as that seen with physical activity, is thought to be the primary factor influencing bone strength. Previous randomized studies that assessed the effect of strength training on bone in premenopausal women report inconsistent results. The analysis herein examines the effect of a strength training program following published guidelines (US Department of Health and Human Services) on bone mineral content (BMC) and areal bone, mineral content (aBMD) in the proximal femur and lumbar spine in premenopausal women. Methods: One hundred and forty-eight overweight, sedentary, premenopausal women aged 25-44 were randomized to progressive strength training (ST, n = 72) or standard care (CO, n = 76) for 2 yr. Measurements occurred at baseline, 1 yr, and 2 yr. Proximal femur and lumbar spine BMC and aBMD were measured by dual energy x-ray absorptiometry. Intention-to-treat analyses were completed, and repeated-measures ANCOVA adjusted for baseline height and weight was used to assess the effect of strength training on bone. Results: aBMD showed little change and did not differ between groups at any site. Femoral neck BMC showed a significant difference in the slopes between ST and CO (P = 0.04) with no change in the ST group and a 1.5% decrease in the CO. There were no significant between-group differences at any other measurement site. Conclusion: Strength training had no effect on aBMD after 2 yr of strength training. Femoral neck BMC decreased in CO and had no change in ST. Because there was no change in aBMD, strength training may have influenced bone size. Research to better understand changes in bone dimensions and geometry with strength training in premenopausal women is warranted.

Original languageEnglish (US)
Pages (from-to)1282-1288
Number of pages7
JournalMedicine and Science in Sports and Exercise
Volume40
Issue number7
DOIs
StatePublished - 2008

Fingerprint

Resistance Training
Bone Density
Carbon Monoxide
Bone and Bones
Femur Neck
Femur
Spine
United States Dept. of Health and Human Services
Intention to Treat Analysis
X-Rays
Guidelines
Exercise
Education
Weights and Measures
Research

Keywords

  • Dxa
  • Exercise
  • Mechanical loading
  • Osteopenia

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Strength training effects on bone mineral content and density in premenopausal women. / Warren, Meghan; Petit, Moira A.; Hannan, Peter J.; Schmitz, Kathryn H.

In: Medicine and Science in Sports and Exercise, Vol. 40, No. 7, 2008, p. 1282-1288.

Research output: Contribution to journalArticle

Warren, Meghan ; Petit, Moira A. ; Hannan, Peter J. ; Schmitz, Kathryn H. / Strength training effects on bone mineral content and density in premenopausal women. In: Medicine and Science in Sports and Exercise. 2008 ; Vol. 40, No. 7. pp. 1282-1288.
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