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Eur J Cancer. 2019 May;113:58-68. doi: 10.1016/j.ejca.2019.03.008. Epub 2019 Apr 11.

Cardiorespiratory fitness and site-specific risk of cancer in men: A systematic review and meta-analysis.

Author information

1
Universidad de Castilla- La Mancha, Health and Social Care Research Center, Cuenca, Spain.
2
Universidad de Castilla- La Mancha, Health and Social Care Research Center, Cuenca, Spain. Electronic address: Celia.AlvarezBueno@uclm.es.
3
EPIUnit - Instituto de Saúde Pública, Universidade do Porto, Rua das Taipas 135, 4050-600, Porto, Portugal.
4
Division of Preventive Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA.
5
Universidad de Castilla- La Mancha, Health and Social Care Research Center, Cuenca, Spain; Universidad Autónoma de Chile, Faculty of Health Sciences, Talca, Chile.

Abstract

BACKGROUND:

Cardiorespiratory fitness is a strong predictor of all-cause morbidity and mortality; nevertheless, the association between cardiorespiratory fitness and the risk of cancer remains unclear. Thus, the aim of this study was to synthetize the evidence on the relationship between cardiorespiratory fitness and the risk of several sites of cancer in men.

METHODS:

A computerised search in MEDLINE, EMBASE and Web of Science databases from their inception to 13th February 2019 was performed. Both fixed and random-effects models were used to calculate the pooled hazard ratio (HR) estimates and their 95% confidence intervals (CIs) to examine the effect of high and moderate versus low cardiorespiratory fitness on site-specific cancer (lung, colon/rectum, prostate) and all-sites cancer.

RESULTS:

Ten studies were included in the qualitative review, and seven of them were included in the meta-analysis. Using low cardiorespiratory fitness as the reference group, moderate and high levels of cardiorespiratory fitness were associated with a lower risk (HRs) of lung cancer, 0.53 (95% confidence interval [CI], 0.39 to 0.68) and 0.52 (95% CI, 0.42 to 0.61); colorectal cancer, 0.74 (95% CI, 0.55 to 0.93) and 0.77 (95% CI, 0.62 to 0.92) and all cancer sites, 0.86 (95% CI, 0.79 to 0.93) and 0.81 (95% CI, 0.75 to 0.87), respectively.

CONCLUSIONS:

Among men, cardiorespiratory fitness plays an important role in protecting against the risk of lung and colorectal cancer. Additionally, this protective effect was observed for all-sites cancer risk. These results show the importance of good cardiorespiratory fitness as a potential factor in cancer prevention.

KEYWORDS:

Cardiorespiratory fitness; Meta-analysis; Risk of cancer; Site-specific cancer

PMID:
30981949
DOI:
10.1016/j.ejca.2019.03.008

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