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Related Experiment Videos

The cytokine response to strenuous exercise

B K Pedersen1, K Ostrowski, T Rohde

  • 1Copenhagen Muscle Research Centre, Department of Infectious Diseases, University of Copenhagen, Denmark. bkp@rh.dk

Canadian Journal of Physiology and Pharmacology
|December 5, 1998
PubMed
Summary

Intense exercise, particularly eccentric exercise, triggers muscle damage and elevates inflammatory cytokines like interleukin-6 (IL-6). This response mirrors sepsis and trauma, highlighting exercise-induced inflammation.

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Area of Science:

  • Exercise physiology
  • Immunology
  • Molecular biology

Background:

  • Strenuous exercise can induce an acute-phase response, involving cytokines similar to sepsis and trauma.
  • Cytokine release, including tumor necrosis factor-alpha, IL-1 beta, IL-6, and IL-1ra, parallels responses seen in bacterial infections.

Purpose of the Study:

  • To review the relationship between exercise, muscle damage, and the subsequent inflammatory cytokine response.
  • To explore the role of eccentric exercise in stimulating local cytokine production.

Main Methods:

  • Review of existing literature on exercise-induced cytokine production.
  • Analysis of studies correlating serum creatine kinase (CK) levels with IL-6 concentrations post-exercise.
  • Examination of skeletal muscle biopsies for mRNA-IL-6 expression after intense exercise.

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Main Results:

  • Eccentric exercise, unlike concentric exercise, significantly increases serum IL-6 concentrations.
  • Elevated IL-6 levels correlate with creatine kinase (CK) levels, indicating exercise-induced muscle damage.
  • mRNA-IL-6 detected in skeletal muscle biopsies post-intense exercise supports local cytokine synthesis.

Conclusions:

  • Mechanical damage to myofibers during eccentric exercise stimulates local inflammatory cytokine production.
  • The exercise-induced inflammatory response shares similarities with sepsis and trauma.
  • Further research is needed to determine if systemic endotoxemia contributes to elevated plasma cytokines during exercise.