Physical activity offsets the negative effects of a high-fructose diet

Amy J. Bidwell, Timothy J. Fairchild, Jessica Redmond, Long Wang, Stefan Keslacy, Jill A. Kanaley

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)2091-2098
Number of pages8
JournalMedicine and Science in Sports and Exercise
Volume46
Issue number11
DOIs
StatePublished - Nov 10 2014

Keywords

  • Carbohydrates
  • Exercise
  • Inflammation
  • Lipidemia

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

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