Exercise performance during inspiratory resistance breathing under exhaustive constant load work

Ergonomics
David M Caretti, J A Whitley

Abstract

The purpose of this study was to determine the effects of different inspiratory resistances on exercise performance and to describe physiological and subjective responses during constant load work of an intensity that elicits the maximum sensitivity to respiratory factors of respirator wear. Nine subjects (mean age 25.8 +/- 4.8 years) performed exhaustive treadmill exercise during constant load work of 80% of maximal aerobic capacity while inspiring against one of five randomly assigned inspiratory resistance conditions. For inspiratory resistances of 0.20 kPa (R1), 0.29 kPa (R2), 0.39 kPa (R3), and 0.49 kPa (R4), measured at a steady air flow rate of 85 L min-1, average performance times were 84, 75, 54, and 30% of the control condition. Performance time reductions were significant for R3 and R4 trials. Results also indicated a significantly reduced mean respiration rate, minute ventilation, and oxygen ventilatory equivalent (VE/VO2) for the R4 condition at exercise breakpoint compared to control. For resistances R1-R4, mean VE/VO2 were significantly reduced from control by approximately 12, 17, 19, and 31%. At breakpoint, mean ratings of perceived exertion were similar for control, R1, R2, and R3 conditions but were significa...Continue Reading

References

Mar 24, 1977·The New England Journal of Medicine·R A Bruce
Jun 1, 1979·American Industrial Hygiene Association Journal·P B RavenT O Davis
Mar 1, 1975·American Industrial Hygiene Association Journal·A T Johnson, E G Cummings
Mar 1, 1992·American Industrial Hygiene Association Journal·A T JohnsonC Grove
Jan 1, 1990·European Journal of Applied Physiology and Occupational Physiology·M JettéS Livingstone
Jul 1, 1985·American Industrial Hygiene Association Journal·W P Morgan, P B Raven
Oct 1, 1973·Archives of Environmental Health·R A BentleyK F Sweetland
Sep 1, 1973·Journal of Applied Physiology·M Demedts, N R Anthonisen
Nov 1, 1969·Journal of Applied Physiology·P CerretelliL E Farhi
Dec 1, 1970·Journal of Applied Physiology·F N CraigE G Cummings
Mar 1, 1984·American Industrial Hygiene Association Journal·G O Dahlbäck, U I Balldin
Aug 1, 1981·American Industrial Hygiene Association Journal·N S DenoD M Kiser

❮ Previous
Next ❯

Citations

Jun 12, 2012·Journal of Huazhong University of Science and Technology. Medical Sciences = Hua Zhong Ke Ji Da Xue Xue Bao. Yi Xue Ying De Wen Ban = Huazhong Keji Daxue Xuebao. Yixue Yingdewen Ban·Man Qiu, Sheng Wang
Nov 23, 2011·Ergonomics·Barbara E Shykoff, Dan E Warkander
Mar 15, 2006·Journal of Occupational and Environmental Hygiene·David M CarettiFrank Koh
Apr 22, 2006·Journal of Occupational and Environmental Hygiene·Frank C KohSanjay Cattungal
Jul 22, 2006·Journal of Occupational and Environmental Hygiene·Karen CoyneFrank Koh
Jan 31, 2009·Journal of Occupational and Environmental Hygiene·Siddharth BansalSilverio Santiago
Dec 18, 2009·Journal of Occupational and Environmental Hygiene·Aitor CocaAndrew Palmiero
Feb 6, 2010·Journal of Occupational and Environmental Medicine·Philip HarberDavid Yun
Jul 9, 2004·Journal of Occupational and Environmental Hygiene·Joyce E RebarDavid M Caretti

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

AIHAJ : a Journal for the Science of Occupational and Environmental Health and Safety
David M CarettiFrank C Koh
European Journal of Applied Physiology and Occupational Physiology
M JettéS Livingstone
European Journal of Applied Physiology and Occupational Physiology
V LouhevaaraT Tuomi
© 2022 Meta ULC. All rights reserved