• J. Occup. Environ. Med. · Aug 2018

    Cardiorespiratory Effects of Air Pollution in a Panel Study of Winter Outdoor Physical Activity in Older Adults.

    • David M Stieb, Robin Shutt, Lisa Marie Kauri, Gail Roth, Mieczyslaw Szyszkowicz, Nina A Dobbin, Li Chen, Marc Rigden, Keith Van Ryswyk, Ryan Kulka, Branka Jovic, Marie Mulholland, Martin S Green, Ling Liu, Guillaume Pelletier, Scott A Weichenthal, and Robert E Dales.
    • Population Studies Division, Health Canada, Vancouver, British Columbia and Ottawa, Ontario (Dr Stieb, Dr Shutt, Dr Kauri, Dr Szyszkowicz, Dr Chen, Jovic, Dr Liu, Dr Dales), School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ontario (Dr Stieb), British Columbia Ministry of Environment and Climate Change Strategy, Prince George, British Columbia (Ms Roth), Air Health Science Division, Health Canada, Vancouver, British Columbia and Ottawa, Ontario (Ms Dobbin, Mr Van Ryswyk, Mr Kulka, Dr Weichenthal), Hazard Identification Division, Health Canada, Ottawa, Ontario (Mr Rigden, Dr Pelletier), University of Ottawa Heart Institute, Ottawa, Ontario (Ms Mulholland, Dr Green), Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Quebec (Dr Weichenthal), and Department of Medicine, University of Ottawa, Ottawa, Ontario (Dr Dales), Canada.
    • J. Occup. Environ. Med. 2018 Aug 1; 60 (8): 673-682.

    ObjectiveThe aim of this study was to assess cardiorespiratory effects of air pollution in older adults exercising outdoors in winter.MethodsAdults 55 years of age and older completed daily measurements of blood pressure, peak expiratory flow and oximetry, and weekly measurements of heart rate variability, endothelial function, spirometry, fraction of exhaled nitric oxide and urinary oxidative stress markers, before and after outdoor exercise, for 10 weeks. Data were analyzed using linear mixed effect models.ResultsPooled estimates combining 2014 (n = 36 participants) and 2015 (n = 34) indicated that an interquartile increase in the Air Quality Health Index was associated with a significant (P < 0.05) increase in heart rate (0.33%) and significant decreases in forced expiratory volume (0.30%), and systolic (0.28%) and diastolic blood pressure (0.39%).ConclusionAcute subclinical effects of air pollution were observed in older adults exercising outdoors in winter.

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