Acute exercise increases resistance to oxidative stress in young but not older adults

Trevor C. Nordin, Aaron J. Done, Tinna Traustadóttir

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

A single bout of acute exercise increases oxidative stress and stimulates a transient increase in antioxidant enzymes. We asked whether this response would induce protection from a subsequent oxidative challenge, different from that of exercise, and whether the effects were affected by aging. We compared young (20 ± 1 years, n = 8) and older (58 ± 6 years, n = 9) healthy men and women. Resistance to oxidative stress was measured by the F2-isoprostane response to forearm ischemia/reperfusion (I/R) trial. Each participant underwent the I/R trial twice, in random order; once after performing 45 min of cycling on the preceding day (IRX) and a control trial without any physical activity (IRC). Baseline F2-isoprostane levels were significantly lower at IRX compared to IRC (P < 0.05) and not different between groups. F2-isoprostane response to IRX was significantly lower compared to IRC in young (P < 0.05) but not different in the older group. Superoxide dismutase activity in response to acute exercise was significantly higher in young compared to older adults (P < 0.05). These data suggest that signal transduction of acute exercise may be impaired with aging. Repeated bouts of transient reactive oxygen species production as seen with regular exercise may be needed to increase resistance to oxidative stress in older individuals.

Original languageEnglish (US)
Article number9727
JournalAge
Volume36
Issue number6
DOIs
StatePublished - Nov 21 2014

Keywords

  • Acute exercise
  • Aging
  • F-isoprostanes
  • Oxidative stress
  • Superoxide dismutase

ASJC Scopus subject areas

  • Aging
  • Geriatrics and Gerontology

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