The acute effects of walking exercise intensity on systemic cytokines and oxidative stress

Malcolm Brown, CM McClean, Gareth Davison, John Brown, Marie H Murphy

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

PurposeOxidative stress is associated with tissue cytokine secretion although the precise mechanism(s) underpinning this relationship during high intensity intermittent exercise remains unclear. This study investigates the acute response to a bout of high intensity intermittent walking (HIIW), compared to continuous moderate intensity walking (CMW), on various cytokines and biomarkers of oxidative stress.MethodsSeventeen (n = 17) apparently healthy male participants (aged 22.6 ± 4.6 years; V˙O2maxV˙O2max: 53.7 ± 7.1 ml kg−1 min−1) undertook a randomised crossover study consisting of two exercise trials: (1) HIIW requiring 3 × 5 min bursts at 80% V˙O2maxV˙O2max (each separated by 5 min of walking at 30% V˙O2maxV˙O2max) and (2) CMW (60% V˙O2maxV˙O2max for 30 min). Each trial was separated by 7 days. Venous blood samples were obtained pre-exercise, post-exercise and at 2, 4, 24 and 48 h post-exercise for determination of systemic inflammation (IL-6 and TNF-α), lipid soluble antioxidants and oxidative stress (LOOH, H2O2 and the ascorbyl free radical).ResultsBoth IL-6 and TNF-α increased immediately post exercise, regardless of intensity and remained elevated until at least 4 h (main effect for time; p 
Original languageEnglish
Pages (from-to)2111-2120
Number of pages10
JournalEuropean Journal of Applied Physiology
Volume118
Issue number10
DOIs
Publication statusPublished - 30 Oct 2018

Keywords / Materials (for Non-textual outputs)

  • walking
  • high intensity intermittent exercise
  • oxidative stress
  • cytokine

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