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Erschienen in: Breast Cancer Research and Treatment 1/2009

01.03.2009 | Epidemiology

Predictors of follow-up exercise behavior 6 months after a randomized trial of exercise training during breast cancer chemotherapy

verfasst von: Kerry S. Courneya, Christine M. Friedenreich, Robert D. Reid, Karen Gelmon, John R. Mackey, Aliya B. Ladha, Caroline Proulx, Jeffrey K. Vallance, Roanne J. Segal

Erschienen in: Breast Cancer Research and Treatment | Ausgabe 1/2009

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Abstract

Purpose Exercise during breast cancer chemotherapy is beneficial but it needs to be maintained into survivorship to optimize long-term benefits. Here, we report the predictors of follow-up exercise behavior 6 months after a randomized exercise trial in breast cancer patients. Methods Breast cancer patients (N = 242) initiating adjuvant chemotherapy were randomly assigned to usual care (n = 82), supervised resistance exercise (n = 82), or supervised aerobic exercise (n = 78) for the duration of their chemotherapy. At baseline and postintervention, data were collected on demographic, medical, behavioral, fitness, psychosocial, and motivational variables. At 6-month follow-up, participants were mailed a questionnaire that assessed exercise behavior over the past 6 months and were categorized as either meeting both aerobic and resistance exercise guidelines, either exercise guideline, or neither exercise guideline. Results Two hundred one (83.1%) participants provided 6-month follow-up data with 85 (42.3%) meeting neither exercise guideline, 74 (36.8%) meeting either exercise guideline, and 42 (20.9%) meeting both exercise guidelines. In multivariate regression analysis, seven variables independently predicted the likelihood of meeting exercise guidelines at follow-up including higher pretrial exercise (β = 0.23; P = 0.002), younger age (β = −0.15; P = 0.028), breast conserving surgery (β = 0.15; P = 0.033), strength improvements (β = 0.15; P = 0.028), lower postintervention fatigue (β = 0.13; P = 0.067), a more positive attitude (β = 0.12; P = 0.086), and lower postintervention body mass index (β = −0.11; P = 0.105). Conclusion Exercise behavior 6 months after a randomized trial was predicted by a wide range of demographic, medical, behavioral, fitness, psychosocial, and motivational variables. These findings may help facilitate the uptake of exercise behavior during the transition from breast cancer patient to survivor.
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Metadaten
Titel
Predictors of follow-up exercise behavior 6 months after a randomized trial of exercise training during breast cancer chemotherapy
verfasst von
Kerry S. Courneya
Christine M. Friedenreich
Robert D. Reid
Karen Gelmon
John R. Mackey
Aliya B. Ladha
Caroline Proulx
Jeffrey K. Vallance
Roanne J. Segal
Publikationsdatum
01.03.2009
Verlag
Springer US
Erschienen in
Breast Cancer Research and Treatment / Ausgabe 1/2009
Print ISSN: 0167-6806
Elektronische ISSN: 1573-7217
DOI
https://doi.org/10.1007/s10549-008-9987-3

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