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A comparative model study of respiratory period prediction on men exercising while wearing masks.

Authors
Johnson-AT; McCuen-RH
Source
IEEE Trans Biomed Eng 1980 Aug; (8):430-439
NIOSHTIC No.
00098800
Abstract
Four respiratory system models were compared to determine effectiveness in predicting the respiratory period of males exercising while wearing masks. Model 1 was based primarily on the assumption of a rectangular respiratory airflow waveshape. Model 2 was similar to model 1, but was based on minimization of inspiratory power, rather than minimization of total cycle power. Model 3 resembled model 2 except that the expiratory reserve volume (ERV) was based on inspiratory work, rather than total cycle work. Model 4 was developed to test the significance of negative work, an element of model 2. All models were sensitive to data inhomogeneity. Minimization of total respiratory power and inspiratory power yielded nearly equivalent results except where a limitation of exhalation time forced expiratory power to be nonminimal. Inclusion of negative work was an essential ingredient. The authors conclude that mask resistance was only half as effective as internal resistance in determining respiratory period. Values for respiratory period varied with conditions under which data were collected.
Keywords
NIOSH-Publication; NIOSH-Grant; Simulation-methods; Analytical-methods; Physical-activity; Respiratory-gas-analysis; Respiratory-functions; Physical-capacity; Measurement-methods; Measurement-instrumentation; Respiratory-system
Contact
Health Education University of Maryland Sports Med & Phys Fitness Ctr College Park, MD 20742
CODEN
IEBEAX
Publication Date
19800801
Document Type
Journal Article
Funding Amount
204385
Funding Type
Grant
Fiscal Year
1980
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-00735
Issue of Publication
8
ISSN
0018-9294
Source Name
IEEE Transactions on Biomedical Engineering
State
MD
Performing Organization
University of Maryland College PK Campus, College Park, Maryland
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