Cardiovascular and Blood Oxidative Stress Responses to Exercise and Acute Woodsmoke Exposure in Recreationally Active Individuals

Cassie M. Williamson-Reisdorph, Kathryn G. Tiemessen, Katie Christison, Shae Gurney, Dylan Richmond, Kesley Wood, Tiffany S. Quindry, Charles L. Dumke, John C. Quindry

Research output: Contribution to journalArticlepeer-review

Abstract

Introduction: Those who work and recreate outdoors experience woodsmoke exposure during fire season. Exercise during woodsmoke exposure harms the cardiovascular system, but the acute physiologic and biochemical responses are understudied. The purpose of this pilot laboratory-based study was to examine the effect of exercise during woodsmoke exposure on acute indicators of cardiovascular function, including heart rate variability (HRV), pulse wave velocity (PWV), blood pressure (BP), augmentation index (AIx), and blood oxidative stress. Methods: Ten participants performed 2 moderate-intensity exercise (70% V˙O2 max) trials (clean air 0 μg·m-3, woodsmoke 250 μg·m-3) in a crossover design. HRV, PWV, BP, AIx, and blood oxidative stress were measured before, after, and 90 min after exercise for each trial. Blood oxidative stress was quantified through lipid damage (LOOH, 8-ISO), protein damage (3-NT, PC), and antioxidant capacity (TEAC). Results: A 45-min woodsmoke exposure combined with moderate-intensity exercise did not result in a statistically significant difference in HRV, PWV, BP, AIx, or oxidative stress (P>0.05). Conclusions: Despite the known deleterious effects of smoke inhalation, moderate-intensity aerobic exercise while exposed to woodsmoke particulate matter (250 μg·m-3) did not result in a statistically significant difference in HRV, PWV, or blood oxidative stress in this methodologic context. Although findings do not negate the negative impact of woodsmoke inhalation, additional research approaches are needed to better understand the acute effects of smoke exposure on the cardiovascular system.

Original languageEnglish
Pages (from-to)17-24
Number of pages8
JournalWilderness and Environmental Medicine
Volume33
Issue number1
DOIs
StatePublished - Mar 2022

Keywords

  • air pollution
  • antioxidants
  • arterial stiffness
  • autonomic recovery
  • free radicals
  • parasympathetic recovery

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