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Predictors of adherence to physical activity in the Lifestyle Interventions and Independence for Elders pilot study (LIFE-P)

Authors W Jack Rejeski, Michael E Miller, Abby C King, Stephanie A Studenski, Jeffrey A Katula, et al For the LIFE Investigators (2006)

Published 15 October 2007 Volume 2007:2(3) Pages 485—494

W Jack Rejeski1, Michael E Miller2, Abby C King3, Stephanie A Studenski4, Jeffrey A Katula1, Roger A Fielding5, Nancy W Glynn4, Michael P Walkup2, Jamile A Ashmore6, For the LIFE Investigators (2006)

1Department of Health and Exercise Science, Wake Forest University; 2Department of Biostatistics, Wake Forest University; 3Stanford University; 4University of Pittsburgh; 5Tuffs University; 6Cooper Institute

Objectives: A prospective design was used to examine predictors of adherence to a physical activity intervention in older adults with compromised function.

Methods: The sample included 213 men (31.1%) and women (68.9%) with an average age of 76.53 years.

Results: The predictor variables accounted for 10% of the variance in percent attendance during adoption and transition, respectively. Adding percent attendance during adoption to the prediction of percent attendance during transition increased the explained variance in this phase to 21%. During maintenance, the predictors accounted for 13% of the variance in frequency of physical activity; this estimate increased to 46% when adding in percent attendance from the transition phase.

Discussion: These results are encouraging in that the physical activity intervention appears to have been well tolerated by diverse subgroups of older adults. The role of prior behavior in predicting downstream adherence underscores the importance of developing proactive interventions for treating nonadherence in older adult populations.

Keywords: Disability, Physical Activity, Older Adults, Adherence

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