Effects of exercise training on bone density in older men and women

J Am Geriatr Soc. 1991 Nov;39(11):1065-70. doi: 10.1111/j.1532-5415.1991.tb02870.x.


Objectives: To determine the effects of up to 14 months of aerobic exercise on measures of bone density in older adults.

Design: Randomized controlled trial with subjects assigned to either an aerobic exercise condition, non-aerobic yoga, or a wait list non-exercise control group for 4 months. Aerobic fitness and bone density were evaluated in all subjects at baseline (Time 1) and after 4 months (Time 2). A semi-crossover design was utilized with all subjects completing 4 months of aerobic exercise, followed by another evaluation (Time 3). All subjects were then given the option of 6 additional months of aerobic exercise, after which they had a fourth evaluation (Time 4).

Setting: An outpatient exercise rehabilitation facility at a large, major medical center.

Subjects: One-hundred-one healthy men (n = 50) and women (n = 51) over age 60 (Mean age = 67.0), recruited from the community.

Intervention: The exercise program included stretching, cycle ergometry, and walking three times per week for 60 minutes throughout the course of the study.

Outcome measures: Aerobic fitness (VO2max) as assessed by cycle ergometry, and bone density (bone mineral content) measured by single photon absorptiometry.

Results: Subjects achieved a 10%-15% increase in VO2max after 4 months of exercise training, and 1%-6% further improvement with additional training. Aerobic fitness was associated with significant increases in bone density in men, but not women, who maintained aerobic exercise for 14 months.

Publication types

  • Clinical Trial
  • Randomized Controlled Trial
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Aged
  • Aged, 80 and over
  • Bone Density / physiology*
  • Exercise / physiology*
  • Female
  • Humans
  • Longitudinal Studies
  • Male
  • Middle Aged
  • Oxygen Consumption / physiology
  • Patient Compliance
  • Physical Education and Training
  • Physical Fitness / physiology
  • Sex Factors