Effect of changes in weight-bearing exercise on lumbar bone mass after age fifty

Beat A. Michel, Nancy E Lane, Daniel A. Bloch, Henry H. Jones, James F. Fries

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

This two year longitudinal study of 40 healthy subjects over age fifty (27 exercisers, 13 non-exercisers) was designed to evaluate the impact of weight-bearing exercise on lumbar bone mineral density as assessed by quantitative computed tomography. In both males and females exercising at moderate levels, a high correlation was found between changes in exercise and changes in bone density (r == 0.78 and 0.91, respectively P < 0.002). For extreme levels of exercise (>300 min/week in females over age fifty, and >200 min/week in males over age seventy) bone density was low, confirming earlier cross-sectional results. Subjects without change in their exercise levels and non-exercisers lost similar amounts of bone. Increasing body mass index was identified as a protective factor with regard to lumbar bone loss. We conclude that in exercisers continuation of weight-bearing exercise is mandatory to prevent excessive bone loss. Extreme levels of exercise may be detrimental to bone density in subjects over age fifty years.

Original languageEnglish (US)
Pages (from-to)397-401
Number of pages5
JournalAnnals of Medicine
Volume23
Issue number4
DOIs
StatePublished - 1991
Externally publishedYes

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Weight-Bearing
Bone Density
Exercise
Bone and Bones
Longitudinal Studies
Healthy Volunteers
Body Mass Index
Tomography

Keywords

  • Bone density
  • Exercise
  • Lumbar spine
  • Osteoporosis

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Effect of changes in weight-bearing exercise on lumbar bone mass after age fifty. / Michel, Beat A.; Lane, Nancy E; Bloch, Daniel A.; Jones, Henry H.; Fries, James F.

In: Annals of Medicine, Vol. 23, No. 4, 1991, p. 397-401.

Research output: Contribution to journalArticle

Michel, Beat A. ; Lane, Nancy E ; Bloch, Daniel A. ; Jones, Henry H. ; Fries, James F. / Effect of changes in weight-bearing exercise on lumbar bone mass after age fifty. In: Annals of Medicine. 1991 ; Vol. 23, No. 4. pp. 397-401.
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