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Social Participation Modifies the Effect of a Structured Physical Activity Program on Major Mobility Disability Among Older Adults: Results From the LIFE Study

2017; Oxford University Press; Volume: 73; Issue: 8 Linguagem: Inglês

10.1093/geronb/gbx051

1758-5368

Duane B. Corbett, W. Jack Rejeski, Catrine Tudor‐Locke, Nancy W. Glynn, Stephen B. Kritchevsky, Mary Mcdermott, Timothy S. Church, Roger A. Fielding, Thomas M. Gill, ­Abby C. King, Michael E. Miller, Haiying Chen, Marco Pahor, Todd M. Manini, Marco Pahor, Jack M. Guralnik, Christiaan Leeuwenburgh, Connie Caudle, Lauren Crump, Latonia Holmes, Jocelyn Lee, Ching-ju Lu, Winston Salem, Michael E. Miller, Mark A. Espeland, Walter T. Ambrosius, William B. Applegate, Daniel P. Beavers, Robert P. Byington, Delilah Cook, Curt D. Furberg, Lea N. Harvin, Leora Henkin, John Hepler, Fang‐Chi Hsu, Laura Lovato, Wesley Roberson, Julia Rushing, Scott Rushing, Cynthia L. Stowe, Michael P. Walkup, Don Hire, W. Jack Rejeski, Jeffrey A. Katula, Peter H. Brubaker, Shannon L. Mihalko, Janine M. Jennings, Evan C. Hadley, Sergei Romashkan, Kushang V. Patel, Denise E. Bonds, Mary Mcdermott, Michelle E. Hauser, Diana Kerwin, Kathryn Domanchuk, Rex Graff, Alvito Rego, Timothy S. Church, Steven N. Blair, Valerie H. Myers, Ron Monce, Nathan E. Britt, Melissa Harris, Ami Parks McGucken, Ruben Rodarte, Heidi K. Millet, Catrine Tudor‐Locke, Ben P. Butitta, Sheletta G. Donatto, Shannon Cocreham, ­Abby C. King, Cynthia M. Castro, William L. Haskell, Randall S. Stafford, Leslie A. Pruitt, Kathy Berra, Veronica Yank, Roger A. Fielding, Miriam E. Nelson, Sara C. Folta, Edward M. Phillips, Christine K. Liu, Erica McDavitt, Kieran F. Reid, Won S. Kim, Vince E. Beard, Todd M. Manini, Marco Pahor, Stephen D. Anton, Thomas W. Buford, Michael Marsiske, Bhanuprasad Sandesara, Jeffrey D. Knaggs, Megan S. Lorow, William C. Marena, Irina Korytov, Holly L. Morris, Margo Fitch, Floris Singletary, Jackie Causer, Katie A. Radcliff, Anne B. Newman, Stephanie A. Studenski, Bret H. Goodpaster, Nancy W. Glynn, Óscar García, Neelesh K. Nadkarni, Kathy Williams, Mark A. Newman, George Grove, Janet T. Bonk, Jennifer Rush, Piera Kost, Diane G. Ives, Stephen B. Kritchevsky, Anthony P. Marsh, Tina E. Brinkley, Jamehl S Demons, Kaycee M. Sink, Kimberly Kennedy, Rachel Shertzer‐Skinner, Abbie Wrights, Rose Fries, Deborah Barr, Thomas M. Gill, Robert S. Axtell, Susan S. Kashaf, Nathalie de Rekeneire, Joanne M. McGloin, Karen C. Wu, Denise Shepard, Barbara Fennelly, Lynne Iannone, Raeleen Mautner, Theresa Sweeney Barnett, Sean N. Halpin, Matthew Brennan, Julie A. Bugaj, Maria Zenoni, Bridget M. Mignosa, Jeff D. Williamson, Kaycee M. Sink, Hugh C. Hendrie, Stephen R. Rapp, Joe Verghese, Nancy Woolard, Mark A. Espeland, Janine Jennings, Carl J. Pepine, Mario Ariet, Eileen Handberg, Daniel Deluca, James O. Hill, Anita Szady, Geoffrey Chupp, Gail M. Flynn, Thomas M. Gill, John Hankinson, Carlos A. Vaz Fragoso, Erik J. Groessl, Robert M. Kaplan,

Physical Activity and Health

To investigate whether baseline social participation modifies the effect of a long-term structured physical activity (PA) program on major mobility disability (MMD). 1,635 sedentary adults (70–89 years) with physical limitations were randomized to either a structured PA or health education (HE) intervention. Social participation was defined categorically at baseline. High social participation was defined as attending organized group functions at least once per week and visiting with noncohabitating friends and family ≥7 hr per week. Anything less was considered limited social participation. Participants performed a standardized walking test at baseline and every 6 months for up to 42 months. MMD was defined as the loss in the ability to walk 400 m. There was a significant intervention by social participation interaction (p = .003). Among individuals with high levels of social participation, those randomized to PA had significantly lower incidence of MMD (hazard ratio [HR], 0.43 [95% confidence interval (CI), 0.27–0.68]; p < .01) than those randomized to HE. Individuals with limited social participation showed no mobility benefit of the PA intervention when compared with their HE counterparts (HR, 0.92 [95% CI, 0.77–1.11]; p = .40). Our findings suggest that baseline social participation is an important factor for the success of a PA intervention aimed at delaying mobility disability.