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A comparative model study of respiratory period prediction on men exercising while wearing masks.
Johnson AT; McCuen RH
IEEE Trans Biomed Eng 1980 Aug; (8):430-439
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.
NIOSH-Publication; NIOSH-Grant; Simulation-methods; Analytical-methods; Physical-activity; Respiratory-gas-analysis; Respiratory-functions; Physical-capacity; Measurement-methods; Measurement-instrumentation; Respiratory-system
Health Education University of Maryland Sports Med & Phys Fitness Ctr College Park, MD 20742
Issue of Publication
IEEE Transactions on Biomedical Engineering
University of Maryland College PK Campus, College Park, Maryland
Page last reviewed: December 11, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division