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Research
Athletes with higher VO2max present reduced oxLDL after a marathon race
  1. André L L Bachi1,2,
  2. Ana Paula R Sierra3,
  3. Francisco J O Rios4,
  4. Danieli A Gonçalves5,
  5. Nabil Ghorayeb6,
  6. Ronaldo L Abud7,
  7. Angélica B Victorino8,
  8. Juliana M B dos Santos9,
  9. Maria Augusta D P Kiss3,
  10. Tania C Pithon-Curi2,
  11. Mauro Vaisberg9
  1. 1Department of Microbiology and Immunology, Federal University of São Paulo, São Paulo, Brazil
  2. 2Institute of Physical Activity Sciences and Sports, Post-Graduate Program in Human Movement Sciences, Cruzeiro do Sul University, São Paulo, Brazil
  3. 3School of Physical Education and Sports, University of São Paulo, São Paulo, Brazil
  4. 4Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
  5. 5Faculty Metodo of São Paulo, São Paulo, Brazil
  6. 6Dante Pazzanese Institute of Cardiology, São Paulo, Brazil
  7. 7Institute of Preventive Medicine of São Paulo, São Paulo, Brazil
  8. 8Department of Neurology and Neurosurgery, Federal University of São Paulo, São Paulo, Brazil
  9. 9Department of Otorhinolaryngology, Federal University of São Paulo, São Paulo, Brazil
  1. Correspondence to Dr André L L Bachi; abachi{at}unifesp.br

Abstract

Background During a session of prolonged and exhaustive exercise, such as a marathon race, large quantities of free radicals are produced and can oxidise (ox) several molecules, such as low-density lipoprotein (LDL). To prevent oxidative damage, athletes present higher antioxidant levels. However, the effect of marathon running on the natural IgM or IgG anti-oxLDL autoantibodies is not understood. Thus, we investigated the effect of a marathon race on oxidative stress and the mechanisms of control of this stress.

Methods Blood samples of 20 marathon runners were collected 24 hours before, immediately and 72 hours after a marathon race to evaluate: plasma lipid profile; serum levels of oxLDL and anti-oxLDL autoantibodies (IgM and IgG isotype) and total antioxidant capacity (TAC). Maximum oxygen uptake (VO2max) was also determined.

Results Immediately after the race, oxLDL and TAC levels decreased in comparison to the basal levels; however, the IgM or IgG anti-oxLDL levels remain unchanged. Whereas no differences were observed in the IgM or IgG anti-oxLDL levels 72h after the marathon, the oxLDL and TAC levels returned to the basal values. Significant positive correlations were observed between oxLDL and LDL-cholesterol before, and 72h after the marathon. Significant negative correlations were observed between oxLDL and VO2max immediately after the marathon and 72 h later, as well as between oxLDL and TAC 72 h after the race.

Conclusions Athletes with a higher VO2max and total antioxidant activity presented reduced LDL oxidation. The levels of IgM or IgG anti-oxLDL autoantibodies were not affected by running the marathon.

  • coronary artery diseases
  • oxidized LDL
  • exhaustive exercise
  • total antioxidant capacity
  • autoantibodies

This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/

https://doi.org/10.1136/bmjsem-2015-000014

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