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United States Department of Agriculture

Agricultural Research Service

Research Project: NUTRITION, PHYSICAL ACTIVITY AND SARCOPENIA IN THE ELDERLY Title: The lifestyle interventions and independence for elders study: design and methods

Authors
item Fielding, Roger A. -
item Rejeski, W. Jack -
item Blair, Stephen -
item Church, Tim -
item Espeland, Mark A. -
item Gill, Thomas M. -
item Guralnik, Jack M. -
item Hsu, Fang-Chi -
item Katula, Jeffery -
item King, Abby C. -
item Kritchevsky, Stephen B. -
item Mcdermott, Mary M. -
item Miller, Michael E. -
item Nayfield, Susan -
item Newman, Anne B. -
item Williamson, Jeff D. -
item Bonds, Denise -
item Romashkan, Sergei -
item Hadley, Evan -
item Pahor, Marco -

Submitted to: Journal of Gerontology Biological Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: June 19, 2011
Publication Date: August 8, 2011
Citation: Fielding, R., Rejeski, W., Blair, S., Church, T., Espeland, M., Gill, T., Guralnik, J., Hsu, F., Katula, J., King, A., Kritchevsky, S., Mcdermott, M., Miller, M., Nayfield, S., Newman, A., Williamson, J., Bonds, D., Romashkan, S., Hadley, E., Pahor, M. 2011. The lifestyle interventions and independence for elders study: design and methods. Journal of Gerontology Biological Science. DOI: 10.1093/gerona/girl123.

Interpretive Summary: As the number of older adults in the United States rises, maintaining functional independence among older Americans has emerged as a major clinical and public health priority. Older people who lose mobility are less likely to remain in the community; demonstrate higher rates of morbidity, mortality, and hospitalizations; and experience a poorer quality of life. Several studies have shown that regular physical activity improves functional limitations and intermediate functional outcomes, but definitive evidence showing that major mobility disability can be prevented is lacking. A Phase 3 randomized controlled trial is needed to fill this evidence gap. The Lifestyle Interventions and Independence for Elders (LIFE) Study is a Phase 3 multicenter randomized controlled trial designed to compare a supervised moderate-intensity physical activity program with a successful aging health education program in 1,600 sedentary older persons followed for an average of 2.7 years. LIFE's primary outcome is major mobility disability, defined as the inability to walk 400 m. Secondary outcomes include cognitive function, serious fall injuries, persistent mobility disability, the combined outcome of major mobility disability or death, disability in activities of daily living, and cost-effectiveness. Results of this study are expected to have important public health implications for the large and growing population of older sedentary men and women.

Technical Abstract: Background. As the number of older adults in the United States rises, maintaining functional independence among older Americans has emerged as a major clinical and public health priority. Older people who lose mobility are less likely to remain in the community; demonstrate higher rates of morbidity, mortality, and hospitalizations; and experience a poorer quality of life. Several studies have shown that regular physical activity improves functional limitations and intermediate functional outcomes, but definitive evidence showing that major mobility disability can be prevented is lacking. A Phase 3 randomized controlled trial is needed to fill this evidence gap. Methods. The Lifestyle Interventions and Independence for Elders (LIFE) Study is a Phase 3 multicenter randomized controlled trial designed to compare a supervised moderate-intensity physical activity program with a successful aging health education program in 1,600 sedentary older persons followed for an average of 2.7 years. Results. LIFE's primary outcome is major mobility disability, defined as the inability to walk 400 m. Secondary outcomes include cognitive function, serious fall injuries, persistent mobility disability, the combined outcome of major mobility disability or death, disability in activities of daily living, and cost-effectiveness. Conclusions. Results of this study are expected to have important public health implications for the large and growing population of older sedentary men and women.

Last Modified: 11/27/2014
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