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Title: Activity patterns in a panel of outdoor workers exposed to oxidant pollution

Abstract

We investigated summer activity patterns in a panel of volunteers drawn from a population segment with potentially high exposure to ambient oxidant pollution. The subjects were 15 men and 5 women aged 19-50, all of whom worked outdoors in the Los Angeles area at least 10 hr per week. The general approach was to (i) calibrate the relationship between ventilation rate (VR) and heart rate (HR) for each subject in controlled exercise; (ii) have subjects monitor their own normal activities with diaries and electronic HR recorders; (iii) estimate VR from HR recordings; and (iv) relate VR with diary descriptions of activities. Calibration data were fit to the equation log (VR) = (intercept) + (slope x HR), intercept and slope being determined separately for each individual to provide a specific equation to predict her/his VR from measured HR. Individuals' correlation coefficients relating log (VR) with HR ranged from 0.83 to 0.95. Subjects monitored themselves for three 24-hr periods during one week, including their most active work day and their most active non-work day. They wore Heart Watch(R) athletic training instruments which recorded HR once per minute; and recorded each change in their activity, location, or breathing rate in diaries. Breathing ratesmore » were classified as sleep, slow, medium, or fast. Diaries showed that sleep occupied about 33% of subject's time, slow activity 59%, medium 7%, and fast 1%. Fast activity was reported only at leisure, never at work. For the group, arithmetic means and standard deviations of predicted VR were 7 +/- 3 L/min for sleep, 12 +/- 7 for slow activity, 14 +/- 8 for medium, and 44 +/- 36 for fast. For the group and for most individuals, distributions of predicted VR within a given activity level (breathing rate) were approximately lognormal, with many values in a narrow range below the arithmetic mean and fewer values in a broader range above it.« less

Authors:
; ; ; ; ;  [1]
  1. Environmental Health Service, Rancho Los Amigos Medical Center, Downey, CA (United States)
Publication Date:
OSTI Identifier:
7222462
Resource Type:
Journal Article
Journal Name:
Journal of Esposure Analysis and Environmental Epidemiology; (United States)
Additional Journal Information:
Journal Volume: 1:4; Journal ID: ISSN 1053-4245
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; LOS ANGELES; AIR POLLUTION; PHOTOCHEMICAL OXIDANTS; HEALTH HAZARDS; AIR POLLUTION MONITORING; ECOLOGICAL CONCENTRATION; EXERCISE; INHALATION; MAN; MATHEMATICAL MODELS; MEDICAL RECORDS; REGRESSION ANALYSIS; RESPIRATION; ANIMALS; CALIFORNIA; DEVELOPED COUNTRIES; HAZARDS; INTAKE; MAMMALS; MATHEMATICS; MONITORING; NORTH AMERICA; POLLUTION; PRIMATES; STATISTICS; URBAN AREAS; USA; VERTEBRATES; 540120* - Environment, Atmospheric- Chemicals Monitoring & Transport- (1990-); 560300 - Chemicals Metabolism & Toxicology

Citation Formats

Shamoo, D A, Johnson, T R, Trim, S C, Little, D E, Linn, W S, and Hackney, J D. Activity patterns in a panel of outdoor workers exposed to oxidant pollution. United States: N. p., 1991. Web.
Shamoo, D A, Johnson, T R, Trim, S C, Little, D E, Linn, W S, & Hackney, J D. Activity patterns in a panel of outdoor workers exposed to oxidant pollution. United States.
Shamoo, D A, Johnson, T R, Trim, S C, Little, D E, Linn, W S, and Hackney, J D. 1991. "Activity patterns in a panel of outdoor workers exposed to oxidant pollution". United States.
@article{osti_7222462,
title = {Activity patterns in a panel of outdoor workers exposed to oxidant pollution},
author = {Shamoo, D A and Johnson, T R and Trim, S C and Little, D E and Linn, W S and Hackney, J D},
abstractNote = {We investigated summer activity patterns in a panel of volunteers drawn from a population segment with potentially high exposure to ambient oxidant pollution. The subjects were 15 men and 5 women aged 19-50, all of whom worked outdoors in the Los Angeles area at least 10 hr per week. The general approach was to (i) calibrate the relationship between ventilation rate (VR) and heart rate (HR) for each subject in controlled exercise; (ii) have subjects monitor their own normal activities with diaries and electronic HR recorders; (iii) estimate VR from HR recordings; and (iv) relate VR with diary descriptions of activities. Calibration data were fit to the equation log (VR) = (intercept) + (slope x HR), intercept and slope being determined separately for each individual to provide a specific equation to predict her/his VR from measured HR. Individuals' correlation coefficients relating log (VR) with HR ranged from 0.83 to 0.95. Subjects monitored themselves for three 24-hr periods during one week, including their most active work day and their most active non-work day. They wore Heart Watch(R) athletic training instruments which recorded HR once per minute; and recorded each change in their activity, location, or breathing rate in diaries. Breathing rates were classified as sleep, slow, medium, or fast. Diaries showed that sleep occupied about 33% of subject's time, slow activity 59%, medium 7%, and fast 1%. Fast activity was reported only at leisure, never at work. For the group, arithmetic means and standard deviations of predicted VR were 7 +/- 3 L/min for sleep, 12 +/- 7 for slow activity, 14 +/- 8 for medium, and 44 +/- 36 for fast. For the group and for most individuals, distributions of predicted VR within a given activity level (breathing rate) were approximately lognormal, with many values in a narrow range below the arithmetic mean and fewer values in a broader range above it.},
doi = {},
url = {https://www.osti.gov/biblio/7222462}, journal = {Journal of Esposure Analysis and Environmental Epidemiology; (United States)},
issn = {1053-4245},
number = ,
volume = 1:4,
place = {United States},
year = {Tue Oct 01 00:00:00 EDT 1991},
month = {Tue Oct 01 00:00:00 EDT 1991}
}