Social cognitive determinants of hospital-based exercise in cancer patients following high-dose chemotherapy and bone marrow transplantation |
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Authors: | Kerry S Courneya Melanie R Keats A Robert Turner |
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Institution: | (1) University of Alberta, E-401 Van Vliet Center, T6G 2H9 Edmonton, Alberta, Canada;(2) Department of Medicine, University of Alberta, Cross Cancer Institute, Edmonton, AB, Canada;(3) University of Alberta, Edmonton, Alberta, Canada |
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Abstract: | Preliminary evidence indicates that physical exercise may be an effective strategy for the rehabilitation of cancer patients
following bone marrow transplantation (BMT), but the determinants of such exercise are not known. In this study, we used a
prospective design to evaluate the theory of planned behavior (Ajzen, 1991) as a social cognitive framework for understanding
exercise motivation and behavior in 37 BMT patients. On admittance to the hospital, participants completed a baseline questionnaire
that assessed the theory of planned behavior and then monitored the frequency and duration of self-initiated cycle ergometer
exercise during their hospitalization. Hierarchical regression analyses demonstrated that intention and perceived behavioral
control explained 36% of the variance in exercise behavior when the analyses were restricted to nonthrombocytopenic patients
(n = 28). Moreover, attitude and perceived behavioral control explained 68% of the variance in exercise intentions. We concluded
that the theory of planned behavior provided an excellent understanding of exercise intentions in this population and context
and that its ability to predict exercise behavior could be improved substantially by taking into account significant medical
complications.
Kerry S. Courneya’s research program is supported by the National Cancer Institute of Canada (NCIC) with funds from the Canadian
Cancer Society (CCS) and the CCS/NCIC Sociobehavioral Cancer Research Network. |
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Keywords: | bone marrow transplantation cancer determinants exercise motivation high-dose chemotherapy theory of planned behavior |
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