Volume 27, Issue 2 e12617
ORIGINAL ARTICLE

Effect of aerobic exercise intervention on markers of insulin resistance in breast cancer women

E. Bruno MSc

Corresponding Author

E. Bruno MSc

Research Fellow

Department of Biomedical Sciences for Health, University of Milan, Milan, Italy

Department of Predictive & Preventive Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy

Correspondence

Eleonora Bruno

Epidemiology & Prevention Unit, Department of Predictive & Preventive Medicine

Fondazione IRCCS Istituto Nazionale dei Tumori

Milano, Italy.

Email: [email protected]

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E. Roveda MD

E. Roveda MD

Assistant Professor

Department of Biomedical Sciences for Health, University of Milan, Milan, Italy

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J. Vitale PhD

J. Vitale PhD

Research Fellow

IRCCS Istituto Ortopedico Galeazzi, Milan, Italy

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A. Montaruli PhD

A. Montaruli PhD

Assistant Professor

Department of Biomedical Sciences for Health, University of Milan, Milan, Italy

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F. Berrino MD

F. Berrino MD

Former Head

Department of Predictive & Preventive Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy

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A. Villarini PhD

A. Villarini PhD

Senior Researcher

Department of Predictive & Preventive Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy

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E. Venturelli MSc

E. Venturelli MSc

Senior Researcher

Department of Predictive & Preventive Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy

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G. Gargano PhD

G. Gargano PhD

Research Fellow

Department of Predictive & Preventive Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy

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L. Galasso MSc

L. Galasso MSc

Research Fellow

Department of Biomedical Sciences for Health, University of Milan, Milan, Italy

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A. Caumo PhD

A. Caumo PhD

Professor

Research Centre of Metabolism, IRCCS Policlinico San Donato Milanese, Milan, Italy

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F. Carandente MD

F. Carandente MD

Full Professor

Department of Biomedical Sciences for Health, University of Milan, Milan, Italy

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P. Pasanisi MD

P. Pasanisi MD

Senior Researcher

Department of Predictive & Preventive Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy

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First published: 07 December 2016
Citations: 32

Abstract

Insulin may affect breast cancer (BC) risk and prognosis. Exercise reduces insulin in obese BC survivors. We designed a randomised controlled trial to test the effect of an aerobic exercise intervention (AEI) on insulin parameters and body composition in non-obese BC women without insulin resistance. Thirty-eight BC women were randomised into an intervention group (IG = 18) or control group (CG = 20). IG participated in a structured AEI for 3 months, while CG received only the Word Cancer Research Fund/American Institute Cancer Research (WCRF/AICR) recommendation to be physically active. Fasting insulin, homeostasis model assessment of insulin resistance (HOMA-IR) index, metabolic parameters and body composition were collected at baseline and after the AEI. IG reduced insulin and HOMA-IR index by 15% and 14%, while CG increased these parameters (+12% and +16%). Insulin changed differently over time in the two randomised groups (pinteraction = .04). The between-group differences in the change of insulin (IG = −1.2 μU/ml versus CG = +0.8 μU/ml) and HOMA-IR index (IG = −0.26 versus CG = +0.25) were respectively significant (p = .04) and non-significant (p = .06). IG significantly improved lower limb muscle mass in comparison with CG (p = .03). A structured AEI may improve insulin, HOMA-IR index and body composition in non-obese BC survivors without insulin resistance.

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