Sponsor
This research was supported by the National Institute for Transportation and Communities (NITC), Portland Metro, and the City of Portland. Alexander Bigazzi is supported by fellowships from the U.S. National Science Foundation (Grant No. DGE-1057604) and NITC.
Document Type
Post-Print
Publication Date
2015
Subjects
Air -- Pollution -- Health aspects -- Oregon -- Portland, Automobiles -- Motors -- Exhaust gas -- Health aspects
Abstract
Bicyclist intake of air pollutants is linked to physical exertion levels, ventilation rates, and exposure concentrations. Whereas exposure concentrations have been widely studied in transportation environments, there is relatively scant research linking on-road ventilation with travel conditions and exertion levels. This paper investigates relationships among power output, heart rate, and ventilation rate for urban bicyclists. Heart rate and ventilation rate were measured on-road and combined with power output estimates from a bicycle power model. Dynamic ventilation rates increased by 0.4-0.8% per watt of power output, with a mean lag of 0.8 minutes. The use of physiology (ventilation) monitoring straps and heart rate proxies for dynamic on-road ventilation measurements are discussed. This paper provides for a clearer and more quantitative understanding of bicyclists’ ventilation and power output, which is useful for studies of pollutant inhalation risks, energy expenditure, and physical activity.
Persistent Identifier
http://archives.pdx.edu/ds/psu/16619
Citation Details
Bigazzi, Alexander Y. and Figliozzi, Miguel A., "Dynamic Ventilation and Power Output of Urban Bicyclists" (2015). Civil and Environmental Engineering Faculty Publications and Presentations. 314.
http://archives.pdx.edu/ds/psu/16619
Included in
Civil Engineering Commons, Environmental Engineering Commons, Transportation Engineering Commons
Description
This is the author's version of the work. The paper was presented at the Transportation Research Record 2015 Annual Meeting on January 12, 2015.