Effect of Respirator Inspiratory Resistance Level on Constant Load Treadmill Work Performance
Respirator inspiratory resistance can affect performance times, especially when the experiment is optimized to elicit respiratory stress. Twelve subjects performed on a treadmill at constant speeds and grades chosen to result in performance times of 5-15 min. Six levels of inspiratory resistance wer...
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| Published in | American Industrial Hygiene Association journal Vol. 60; no. 4; pp. 474 - 479 |
|---|---|
| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Fairfax, VA
AIHA JOURNAL
01.07.1999
American Industrial Hygiene Association Taylor & Francis Ltd |
| Subjects | |
| Online Access | Get full text |
| ISSN | 0002-8894 |
| DOI | 10.1080/00028899908984467 |
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| Abstract | Respirator inspiratory resistance can affect performance times, especially when the experiment is optimized to elicit respiratory stress. Twelve subjects performed on a treadmill at constant speeds and grades chosen to result in performance times of 5-15 min. Six levels of inspiratory resistance were used, ranging from 0.78 to 7.64 cm H
2
O·sec/L. The results showed that performance times decrease linearly with resistance level, and no threshold resistance value is apparent. Inspiratory resistance also induces hypoventilation, with lower minute volumes and lower oxygen consumption values at higher resistances. These trends are also linear. From these results, there is no value for inspiratory resistance that can be given as a design goal. Other parameters such as weight and space may dictate filter resistance values, and these, in turn, will lead to determined performance degradations. |
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| AbstractList | Respirator inspiratory resistance can affect performance times, especially when the experiment is optimized to elicit respiratory stress. Twelve subjects performed on a treadmill at constant speeds and grades chosen to result in performance times of 5-15 min. Six levels of inspiratory resistance were used. The results showed that performance times decrease linearly with resistance level, and no threshold resistance value is apparent. Inspiratory resistance also induces hypoventilalion, with lower minute volumes and lower oxygen consumption values at higher resistances. These trends are also linear. From these results, there is no value for inspiratory resistance that can be given as a design goal. Other parameters such as weight and space may dictate filter resistance values, and these, in turn, will lead to determined performance degradations. Respirator inspiratory resistance can affect performance times, especially when the experiment is optimized to elicit respiratory stress. Twelve subjects performed on a treadmill at constant speeds and grades chosen to result in performance times of 5-15 min. Six levels of inspiratory resistance were used, ranging from 0.78 to 7.64 cm H2O.sec/L. The results showed that performance times decrease linearly with resistance level, and no threshold resistance value is apparent. Inspiratory resistance also induces hypoventilation, with lower minute volumes and lower oxygen consumption values at higher resistances. These trends are also linear. From these results, there is no value for inspiratory resistance that can be given as a design goal. Other parameters such as weight and space may dictate filter resistance values, and these, in turn, will lead to determined performance degradations.Respirator inspiratory resistance can affect performance times, especially when the experiment is optimized to elicit respiratory stress. Twelve subjects performed on a treadmill at constant speeds and grades chosen to result in performance times of 5-15 min. Six levels of inspiratory resistance were used, ranging from 0.78 to 7.64 cm H2O.sec/L. The results showed that performance times decrease linearly with resistance level, and no threshold resistance value is apparent. Inspiratory resistance also induces hypoventilation, with lower minute volumes and lower oxygen consumption values at higher resistances. These trends are also linear. From these results, there is no value for inspiratory resistance that can be given as a design goal. Other parameters such as weight and space may dictate filter resistance values, and these, in turn, will lead to determined performance degradations. Respirator inspiratory resistance can affect performance times, especially when the experiment is optimized to elicit respiratory stress. Twelve subjects performed on a treadmill at constant speeds and grades chosen to result in performance times of 5-15 min. Six levels of inspiratory resistance were used, ranging from 0.78 to 7.64 cm H 2 O·sec/L. The results showed that performance times decrease linearly with resistance level, and no threshold resistance value is apparent. Inspiratory resistance also induces hypoventilation, with lower minute volumes and lower oxygen consumption values at higher resistances. These trends are also linear. From these results, there is no value for inspiratory resistance that can be given as a design goal. Other parameters such as weight and space may dictate filter resistance values, and these, in turn, will lead to determined performance degradations. Respirator inspiratory resistance can affect performance times, especially when the experiment is optimized to elicit respiratory stress. Twelve subjects performed on a treadmill at constant speeds and grades chosen to result in performance times of 5-15 min. Six levels of inspiratory resistance were used, ranging from 0.78 to 7.64 cm H2O.sec/L. The results showed that performance times decrease linearly with resistance level, and no threshold resistance value is apparent. Inspiratory resistance also induces hypoventilation, with lower minute volumes and lower oxygen consumption values at higher resistances. These trends are also linear. From these results, there is no value for inspiratory resistance that can be given as a design goal. Other parameters such as weight and space may dictate filter resistance values, and these, in turn, will lead to determined performance degradations. |
| Author | Lausted, Christopher G. Benjamin, M. Benhur Coyne, Karen M. Johnson, Monique M. Johnson, Arthur T. Scott, William H. Sahota, Manjit S. |
| Author_xml | – sequence: 1 givenname: Arthur T. surname: Johnson fullname: Johnson, Arthur T. – sequence: 2 givenname: William H. surname: Scott fullname: Scott, William H. – sequence: 3 givenname: Christopher G. surname: Lausted fullname: Lausted, Christopher G. – sequence: 4 givenname: M. Benhur surname: Benjamin fullname: Benjamin, M. Benhur – sequence: 5 givenname: Karen M. surname: Coyne fullname: Coyne, Karen M. – sequence: 6 givenname: Manjit S. surname: Sahota fullname: Sahota, Manjit S. – sequence: 7 givenname: Monique M. surname: Johnson fullname: Johnson, Monique M. |
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| Copyright | Copyright Taylor & Francis Group, LLC 1999 1999 INIST-CNRS Copyright American Industrial Hygiene Association Jul/Aug 1999 |
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| Keywords | Treadmill exercise Physical exercise Human Physical performance Apparatus Inspiratory resistive load Individual safety equipment Respiration Workload |
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| SubjectTerms | Adolescent Adult Airway Resistance Applied physiology Biological and medical sciences Design Ergonomics. Work place. Occupational physiology Exercise Exercise Test Female Fitness equipment Human physiology applied to population studies and life conditions. Human ecophysiology Humans Hypoventilation Inspiratory Capacity Male Maximum oxygen consumption Medical sciences Oxygen Consumption Personal protective equipment Reference Values resistance respirator Respiratory Protective Devices - standards Respiratory system Studies Work |
| Title | Effect of Respirator Inspiratory Resistance Level on Constant Load Treadmill Work Performance |
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