172336 Association between exercise patterns and bone mineral density in postmenopausal African American women: The HASAAW study

Tuesday, October 28, 2008: 12:50 PM

Paula R. Beerman, MPH , Moores UCSD Cancer Center, University of California, San Diego, La Jolla, CA
Caroline Macera, PhD , Graduate School of Public Health, San Diego State University, San Diego, CA
Elizabeth Barrett-Connor, MD , Department of Family and Preventive Medicine, University of California, San Diego, La Jolla, CA
Wilma Wooten, MD, MPH , Department of Public Health, San Diego County, San Diego, CA
Vanessa Malcarne, PhD , Department of Psychology, San Diego State University, San Diego, CA
Ming Ji, PhD , San Diego State University, Graduate School of Public Health, San Diego, CA
According to the National Osteoporosis Foundation, 5% of African American women over 50 years of age have osteoporosis and an additional 35% have osteopenia, which puts them at risk for osteoporosis and fractures. Weight-bearing exercise has been shown to maintain bone mineral density (BMD) in white women, but little research has been reported in African American women. According to the CDC only 29% of African American women aged 45-64 are meeting their recommendations that adults engage in 30 minutes of exercise 3-5 days per week. The purpose of this study was to determine if reported weight-bearing exercise is associated with better BMD in community-dwelling African American women.

Data are from the Health Assessment Survey of African American Women (HASAAW), a cross sectional study conducted in Southern California from 1992-1999. There were, 337 postmenopausal African American women, mean age 62 years, mean BMI 29, of whom 5% had osteoporosis (BMD < -2.5). Most were sedentary white collar workers, but 22% percent were in an organized exercise program and 8% reported weight-training exercise. Hierarchal linear regression analysis indicated that being in an organized exercise program was significantly associated with increased total hip BMD, while weight lifting in the last 2 weeks was significantly associated with increased lumbar spine BMD (p < 0.05). Future research should be conducted on BMD and exercise in African American women, to determine the optimal types and amount of physical activity needed to maintain or increase BMD at the hip and spine.

Learning Objectives:
Assess weight-bearing exercise and it's effect on bone mineral density in a cohort of postmenopausal African American's in San Diego County.

Keywords: Chronic Diseases, Exercise

Presenting author's disclosure statement:

Qualified on the content I am responsible for because: this was part of my master's thesis that was defended successfully in 2007.
Any relevant financial relationships? No

I agree to comply with the American Public Health Association Conflict of Interest and Commercial Support Guidelines, and to disclose to the participants any off-label or experimental uses of a commercial product or service discussed in my presentation.

See more of: Women's Health
See more of: Epidemiology