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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/35581

Title: Effects of supervised exercise on cancer-related fatigue in breast cancer survivors: a systematic review and meta-analysis
Authors: Meneses-Echávez, José F.
González Jiménez, Emilio
Ramírez-Vélez, Robinson
Issue Date: 2015
Abstract: Background: Cancer-related fatigue (CRF) is the most common and distressing symptom in breast cancer survivors. Approximately 40% to 80% of cancer patients undergoing active treatment suffer from CRF. Exercise improves overall quality of life and CRF; however, the specific effects of the training modalities are not well understood.
Methods: This study aimed to determine the pooled effects of supervised exercise interventions on CRF in breast cancer survivors. We searched PubMed/MEDLINE, EMBASE, Scopus, CENTRAL and CINAHL databases between December 2013 and January 2014 without language restrictions. Risk of bias and methodological quality were evaluated using the PEDro score. Pooled effects were calculated with a random-effects model according to the DerSimonian and Laird method. Heterogeneity was evaluated with the I2 test.
Results: Nine high-quality studies (n = 1156) were finally included. Supervised aerobic exercise was statistically more effective than conventional care in improving CRF among breast cancer survivors (SMD = −0.51, 95%CI −0.81 to −0.21), with high statistical heterogeneity (P = 0.001; I2 = 75%). Similar effects were found for resistance training on CRF (SMD = −0.41, 95%CI −0.76 to −0.05; P = 0.02; I2 = 64%). Meta-regression analysis revealed that exercise volume parameters are closely related with the effect estimates on CRF. Egger’s test suggested moderate evidence of publication bias (P = 0.04).
Conclusions: Supervised exercise reduces CRF and must be implemented in breast cancer rehabilitation settings. High-volume exercises are safe and effective in improving CRF and overall quality of life in women with breast cancer. Further research is encouraged.
Sponsorship: The authors would like to acknowledge Universidad Santo Tomás, Bogotá for the financial support to the GICAEDS Group (Project: Práctica del autoexamen de seno y los conocimientos, factores de riesgo y estilos de vida relacionados al cáncer de mama en mujeres jóvenes de la USTA – Number: 4110060001-008).
Publisher: Biomed Central
Keywords: Breast Neoplasms
Exercise
Resistance training
Rehabilitation
Medical oncology
URI: http://hdl.handle.net/10481/35581
ISSN: 1471-2407
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Meneses-Echávez, J.F.; González Jiménez, E.; Ramírez-Velez, R. Effects of supervised exercise on cancer-related fatigue in breast cancer survivors: a systematic review and meta-analysis. BMC Cancer, 15: 77 (2015). [http://hdl.handle.net/10481/35581]
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