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Journal of Aging Research
Volume 2011, Article ID 420714, 10 pages
http://dx.doi.org/10.4061/2011/420714
Research Article

The Impact of Physical Activity on Disability Incidence among Older Adults in Mexico and the United States

1Institute of Gerontology, College of Public Health, University of Georgia, 255 E. Hancock Avenue, Athens, GA 30602, USA
2Sealy Center on Aging, University of Texas Medical Branch, Galveston, TX 77555, USA

Received 31 August 2010; Revised 14 January 2011; Accepted 17 February 2011

Academic Editor: Iris Reuter

Copyright © 2011 Kerstin Gerst et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Evidence suggests that transitions among older adults towards healthy habits, such as physical activity, appear underway in developed countries such as the USA but not in developing countries such as Mexico. However, little is known about the potential benefit of physical activity in preventing disability among elders in countries at different stages of epidemiological transition. We explore the impact of physical activity on the disablement process among elders in Mexico compared to the USA. Data are from two waves of the Mexican Health and Aging Study and the Health and Retirement Study. We examine the impact of exercise on the transition from no disability to ADL limitations two years later. Findings indicate that exercise is more common in the U.S. than in Mexico. There is a positive effect of exercise on negative outcomes in both countries. However, the protective effect of exercise is stronger in the U.S. than in Mexico.