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Nutrición Hospitalaria

On-line version ISSN 1699-5198Print version ISSN 0212-1611

Abstract

COCATE, Paula G. et al. Usual dietary glycemic load is associated with cardiometabolic risk factors in physically active Brazilian middle-aged men. Nutr. Hosp. [online]. 2014, vol.29, n.2, pp.444-451. ISSN 1699-5198.  http://dx.doi.org/10.3305/nh.2014.29.2.7121.

Introduction: The effects of dietary glycemic load (GL) on cardiometabolic risk factors in physically active subjects are not completely known. Objective: This cross-sectional study assessed the association of habitual dietary GL with cardiometabolic risk factors in physically active Brazilian middle-aged men. Methods: One-hundred seventy-six subjects (Age: 50.6 ± 5.0 years, BMI: 25.5 ± 3.6 kg/m2) were evaluated. Anthropometry, lifestyle features, insulin resistance, oxidative stress biomarkers (8-iso-prostaglandin F2α; 8-iso-PGF2α and 8-hydroxydeoxyguanosine; 8-OHdG) and lipid profile were assessed. Dietary intake was estimated through a quantitative food frequency questionnaire. Results: The dietary GL was positively associated with free fatty acid concentrations (β = 0.311, r2 = 0.13, P-value = 0.034) and triglycerides/HDL cholesterol ratio (β = 0.598, r2 = 0.19, P-value = 0.028) regardless of confounding factors (central obesity, red meat consumption, age and energy intake). The oxidative stress biomarker, 8-OHdG, was associated with habitual dietary GL (β = 0.432, r2 = 0.11, P-value = 0.004), regardless of previous confounding factors plus excessive alcohol consumption, iron intake and current smoking status. Conclusions: The dietary GL was positively associated with lipid profile (free fatty acid concentrations and triglycerides/HDL cholesterol ratio) and oxidative stress biomarker (8-OHdG). These results indicate potential harmfulness of diet with higher GL to cardiometabolic risk factors in middle-aged men, even in physically active individuals.

Keywords : Food habits; Carbohydrate; Triglycerides; High-density lipoproteins; Oxidative stress.

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