title: Bicycle messengers: energy expenditure and exposure to air pollution.
abstract: The purpose of the study was to determine the level of energy expenditure and exposure to air pollution for bicycle messengers. Relationships between heart rate (HR) and oxygen uptake, and between HR and pulmonary ventilation (VE) for each participant were established in laboratory tests. Air pollution and HR were measured during one working day. The total oxygen uptake was then described as the total energy expenditure in Joule (J) and in multiples of the energy expenditure at rest (MET). The mean energy expenditure during a working day (8 h) was 12 MJ, (4.8 MET). The level of air pollution exposure when cycling seemed to be comparable with the levels of exposure when sitting inside a vehicle. The VE during cycling was four times higher than resting value. Increased VE led to increased exposure to air pollution.
authors.affiliation: Department of Public Health Sciences, Division of Occupational Medicine, Karolinska Institute, Stockholm, Sweden. Eva.Bernmark@sll.se
authors.forename: Eva
authors.initials: E
authors.lastname: Bernmark
authors.forename: Christina
authors.initials: C
authors.lastname: Wiktorin
authors.forename: Magnus
authors.initials: M
authors.lastname: Svartengren
authors.forename: Marie
authors.initials: M
authors.lastname: Lewné
authors.forename: Samuel
authors.initials: S
authors.lastname: Aberg
mesh_terms: D000328:Adult; D000397:Air Pollution; D001642:Bicycling; D004734:Energy Metabolism / Q000502:physiology*; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male; D016273:Occupational Exposure; D010101:Oxygen Consumption / Q000502:physiology; D013548:Sweden