Back to Annual Meeting Page		American Public Health Association 133rd Annual Meeting & Exposition December 10-14, 2005 Philadelphia, PA

Abstract #119046

Rebecca E. Hasson, Department of Exercise Science, University of Massachusetts, 1040 North Pleasant Street #400, Amherst, MA 01002, 413-549-0692, ccrimmins@asph.org

PURPOSE: Sedentary and overweight are risk factors for Type 2 diabetes and the risk for African-Americans is 2-fold greater than for Caucasians. The ethnic disparity has been linked to a greater insulin response to ingested glucose in African Americans. A single bout of exercise reduces the insulin response to glucose in previously sedentary individuals. Because there is a reasonable possibility that there is an ethnic difference in the exercise response, the purpose of this study was to evaluate the impact of a single bout of exercise on insulin response to glucose in African-American women. METHODS: Five sedentary overweight/obese African-American women completed 2 conditions. In the sedentary condition participants sat quietly. In the exercise condition, participants completed 75' of moderate intensity exercise. Ninety minutes following either condition, participants underwent a standard oral glucose tolerance test (OGTT). Three hours later, subjects consumed a meal high in carbohydrate (meal tolerance test, MTT). Venous blood samples were taken every 30' and glucose and insulin responses calculated as the area under the curve.

RESULTS: These results are preliminary and no statistical comparison will be made until data collection (n=9) is complete. To date, exercise has no obvious effect on the glucose or insulin area under the curve during the OGTT or MTT.

CONCLUSIONS: If this pattern is maintained, the results suggest that a single bout of moderate-intensity exercise does not modify the insulin response to glucose in African-American women.

Learning Objectives:

• Its known that one of the benefits of physical activity is increased insulin action. The results of this exploratory investigation will determine if an acute bout of aerobic exercise at a specific intensity and duration, will elicit an increase in insulin action and glucose tolerance in a high-risk African- American population.

Keywords: African American, Exercise

Presenting author's disclosure statement:

I wish to disclose that I have NO financial interests or other relationship with the manufactures of commercial products, suppliers of commercial services or commercial supporters.