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Effects of exercise intervention in breast cancer survivors: a meta-analysis of 33 randomized controlled trails

Authors Zhu G, Zhang X, Wang Y, Xiong H, Zhao Y, Sun F

Received 8 October 2015

Accepted for publication 30 November 2015

Published 13 April 2016 Volume 2016:9 Pages 2153—2168


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Editor who approved publication: Professor Daniele Santini

Guoqing Zhu,1 Xiao Zhang,1 Yulan Wang,1 Huizi Xiong,2 Yinghui Zhao,1 Fenyong Sun1

1Department of Clinical Laboratory Medicine, 2Department of Dermatology, Shanghai Tenth People’s Hospital of Tongji University, Shanghai, People’s Republic of China

Background: Exercise is associated with favorable outcomes in cancer survivors. The purpose of this meta-analysis is to comprehensively summarize the effects of exercise intervention in breast cancer survivors.
Methods: A systematic search of PubMed, Elsevier, and Google scholar was conducted up to March 2015. References from relevant meta-analyses and reviews were also checked.
Results: Thirty-three randomized controlled trials were included in this meta-analysis, including 2,659 breast cancer survivors. Compared with the control group, quality of life was significantly improved in exercise intervention group, especially in mental health and general health subscales of short form 36 questionnaire, as well as emotion well-being and social well-being subscales of the Functional Assessment of Cancer Therapy. Besides, exercise alleviated the symptoms of depression and anxiety in the exercise group. Furthermore, exercise was also associated with positive outcomes in body mass index, lean mass, and muscle strength. In addition, the serum concentration of insulin, insulin-like growth factor-II, and insulin-like growth factor binding protein-1 was significantly reduced in exercise intervention group. However, based on the current data of this meta-analysis, there were no significant differences in sleep dysfunction or fatigue between groups.
Conclusion: Our study suggested that exercise intervention was beneficial to breast cancer survivors. Therefore, exercise should be recommended to this patient group.

Keywords: exercise, quality of life, depression, BMI, insulin

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