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The effect of a lifestyle intervention on metabolic health in young women

Authors Dunn S, Siu W, Freund J, Boutcher SH

Received 16 May 2014

Accepted for publication 11 June 2014

Published 19 September 2014 Volume 2014:7 Pages 437—444


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Sarah L Dunn,1 Winnie Siu,2 Judith Freund,2,3 Stephen H Boutcher2

1Department of Kinesiology, University of La Verne, CA, USA; 2School of Medical Sciences, Faculty of Medicine, University of New South Wales, NSW, Australia; 3St Vincent's Hospital, NSW, Australia

Abstract: With the increasing obesity rates in Western countries, an effective lifestyle intervention for fat reduction and metabolic benefits is needed. High-intensity intermittent exercise (HIIE), Mediterranean eating habits (Mediet), and fish oil (ω-3) consumption positively impact metabolic health and adiposity, although the combined effect has yet to be determined. A 12-week lifestyle intervention on adiposity, insulin resistance, and interleukin-6 (IL-6) levels of young overweight women was administered. Thirty women with a body mass index of 26.6±0.5 kg/m2, blood pressure of 114/66±1.9/1.5 mmHg, and age of 22±0.8 years were randomly assigned to either an intervention group receiving Mediet advice, daily ω-3 supplementation, and HIIE 3 days/week for 12 weeks or a control group. The group receiving Mediet advice, daily ω-3 supplementation, and HIIE experienced a significant reduction in total body fat mass (P<0.001), abdominal adiposity (P<0.05), waist circumference (P<0.001), systolic blood pressure (P<0.05), fasting plasma insulin (P<0.05), IL-6 (P<0.001), and triglycerides (P<0.05). The greatest decreases in fasting plasma insulin (P<0.05) and IL-6 (P<0.001) occurred by week 6 of the intervention. Significant improvements in eating habits (P<0.05) and aerobic fitness (P<0.001) were also found following the intervention. A multifaceted 12-week lifestyle program comprising a Mediet, ω-3 supplementation, and HIIE induced significant improvements in fat loss, aerobic fitness, and insulin and IL-6 levels, positively influencing metabolic health.

Keywords: metabolic syndrome, overweight, exercise, diet

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