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Physical activity offsets the negative effects of a High-Fructose diet

Bidwell, A.J., Fairchild, T.J., Redmond, J., Wang, L., Keslacy, S. and Kanaley, J.A. (2014) Physical activity offsets the negative effects of a High-Fructose diet. Medicine & Science in Sports & Exercise, 46 (11). pp. 2091-2098.

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Objective: This study aimed to determine the interaction between a high-fructose diet and PA levels on postprandial lipidemia and inflammation in normal-weight, recreationally active individuals.

Methods: Twenty-two men and women (age, 21.2 ± 0.6 yr; body mass index, 22.5 ± 0.6 kg•m−2) consumed an additional 75 g of fructose for 14 d on two separate occasions: high physical activity (PA) (approximately 12,500 steps per day) (FR+active) and low PA (approximately 4500 steps per day) (FR+inactive). A fructose-rich test meal was given before and at the end of each intervention. Blood was sampled at baseline and for 6 h after the meal for triglycerides (TG), VLDL, total cholesterol, glucose, insulin, tumor necrosis factor-α, interleukin 6, and C-reactive protein.

Results: Log-transformed TG area under the curve (AUC) significantly increased from before (10.1 ± 0.1 mg•dL−1 × min for 6 h) to after (10.3 ± 0.08 mg•dL−1 × min for 6 h, P = 0.04) the FR+inactive intervention, with an 88% increase in Δpeak TG (P = 0.009) and an 84% increase in Δpeak VLDL (P = 0.002). ΔPeak interleukin 6 also increased by 116% after the FR+inactive intervention (P = 0.009). Insulin total AUC significantly decreased after FR+active intervention (P = 0.04), with no change in AUC after the FR+inactive intervention. No changes were observed in glucose, tumor necrosis factor-α, and C-reactive protein concentrations (P > 0.05).

Conclusions: Low PA during a period of high fructose intake augments fructose-induced postprandial lipidemia and inflammation, whereas high PA minimizes these fructose-induced metabolic disturbances. Even within a young healthy population, maintenance of high PA (>12,500 steps per day) decreases susceptibility to cardiovascular risk factors associated with elevated fructose consumption.

Publication Type: Journal Article
Murdoch Affiliation: School of Psychology and Exercise Science
Publisher: Lippincott Williams & Wilkins
Copyright: © 2014 American College of Sports Medicine
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