Article Text

Download PDFPDF

Correlations between plasma noradrenaline concentrations, antioxidants, and neutrophil counts after submaximal resistance exercise in men
  1. A Ramel1,
  2. K-H Wagner2,
  3. I Elmadfa2
  1. 1Unit for Nutrition Research, University of Iceland, Reykjavik, Iceland
  2. 2Institute of Nutritional Sciences, University of Vienna, Vienna, Austria
  1. Correspondence to:
 Dr Alfons Ramel
 Haedargardur 18, Reykjavik, Iceland; ramel{at}hi.is

Abstract

Background: Generation of reactive oxygen species (ROS) during exercise has been linked to increased oxygen consumption. ROS could also be produced by other mechanisms—for example, a respiratory burst of neutrophils or catecholamine auto-oxidation—when oxygen consumption is only moderately increased.

Objectives: To investigate noradrenaline concentrations, neutrophil counts, plasma antioxidants, and lipid oxidation products before and after acute resistance exercise.

Methods: 17 male participants undertook a submaximal resistance exercise circuit (10 exercises; 75% of the one repetition maximum; mean (SD) exercise time, 18.6 (1.1) minutes). Blood samples were taken before and immediately after exercise and analysed for plasma antioxidants, noradrenaline, neutrophils, and lipid oxidation products. Wilcoxon’s signed-rank test and Pearson’s correlation coefficient were used for calculations.

Results: Neutrophils, noradrenaline, fat soluble antioxidants, and lipid oxidation products increased after exercise. Noradrenaline concentrations were associated with higher antioxidant concentrations. Neutrophils were related to higher concentrations of conjugated dienes.

Conclusions: Submaximal resistance exercise increases plasma antioxidants. This might reflect enhanced antioxidant defence in response to the oxidative stress of exercise, though this is not efficient for inhibiting lipid oxidation. The correlation between noradrenaline concentrations and plasma antioxidants suggests a modulating role of the stress hormone. Neutrophils are a possible source of oxidative stress after resistance exercise.

  • MDA, malondialdehyde
  • ROS, reactive oxygen species
  • 1-RM, one repetition maximum
  • resistance exercise
  • neutrophils
  • antioxidants
  • noradrenaline
View Full Text

Statistics from Altmetric.com

Footnotes

    Request Permissions

    If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.

    Linked Articles

    • Miscellanea
      BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine