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Seung-youn Hong, MEd1, Susan L. Hughes, DSW2, and Thomas R. Prohaska, PhD2. (1) Dept. of Community Health Science, Center for Research on Health and Aging, University of Illinois at Chicago, 850 W. Jackson (M/C 275), Suite 400, Chicago, IL 60607, 312-413-9810, yoni91@hotmail.com, (2) Center for Research on Health and Aging, University of Illinois at Chicago, 850 W. Jackson (M/C 275), Suite 400, Chicago, IL 60607
Multiple studies have examined the impact of exercise on sedentary older adults. However, operational definitions of "sedentary" have varied across studies and the impact of these definitions on exercise attendance (ATR) and completion rate (CPR) is unknown. We examined CPR and ATR from 46 aerobic exercise RCTs targeting sedentary seniors. These studies defined "sedentary" up to five ways: (a) used term "sedentary" only, (b) no regular exercise participation, (c) no prior exercise within a specific time period, (d) the duration or frequency of prior exercise specified, and (e) failure to meet the ACSM guideline (i.e., 3/week,³ 20 min). Forty-three CPR and 28 ATR outcomes have been analyzed with one-way ANOVA to examine the impact of these ways of defining sedentary. Aerobic exercise interventions <=6 months (25 CPR, 17 ATR), using duration/frequency (89.23± 7.47 %, p=.002) and regularity of exercise (88.04 ±8.17%, p=.028) to define "sedentary" had significantly higher CPR than studies that did not use these definitions. Studies reporting the length of time persons were sedentary have higher CPR than those that did not, approaching significance (p=.057). Studies using the ACSM criterion showed a similar but not significant trend (p=.07). The difference between CPR as a function of the sedentary definition used decreased as the length of the intervention increased and none of the relationships was significant with interventions > 6months. Surprisingly, ATR was not influenced by any of the sedentary definitions. We conclude that future exercise interventions need to pay careful attention to their definition of sedentary.
Learning Objectives:
Keywords: Exercise, Research
Presenting author's disclosure statement:
I do not have any significant financial interest/arrangement or affiliation with any organization/institution whose products or services are being discussed in this session.