Publications [#143871] of James A. Blumenthal

Papers Published

1. JA Blumenthal, CF Emery, DJ Madden, S Schniebolk, MW Riddle, FR Cobb, M Higginbotham, RE Coleman (1991). Effects of exercise training on bone density in older men and women.. Journal of the American Geriatrics Society, 39(11), 1065-70.
   (last updated on 2013/05/16)

   Abstract:
   OBJECTIVE: To determine the effects of up to 14 months of aerobic exercise on measures of bone density in older adults. METHODS: 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). METHODS: An outpatient exercise rehabilitation facility at a large, major medical center. METHODS: One-hundred-one healthy men (n = 50) and women (n = 51) over age 60 (Mean age = 67.0), recruited from the community. METHODS: The exercise program included stretching, cycle ergometry, and walking three times per week for 60 minutes throughout the course of the study. METHODS: 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.