The effects of age on dyspnea and respiratory mechanical and neural responses to exercise in healthy men
Article
Article Title | The effects of age on dyspnea and respiratory mechanical and neural responses to exercise in healthy men |
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ERA Journal ID | 201375 |
Article Category | Article |
Authors | MacAskill, William, Hoffman, Ben, Johnson, Michael A., Sharpe, Graham R., Rands, Joshua, Wotherspoon, Shoena E., Gevorkov, Yaroslav, Kolbe-Alexander, Tracy L. and Mills, Dean E. |
Journal Title | Physiological Reports |
Journal Citation | 11 (16) |
Article Number | e15794 |
Number of Pages | 16 |
Year | 2023 |
Publisher | John Wiley & Sons |
Place of Publication | United Kingdom |
ISSN | 2051-817X |
Digital Object Identifier (DOI) | https://doi.org/10.14814/phy2.15794 |
Web Address (URL) | https://physoc.onlinelibrary.wiley.com/doi/10.14814/phy2.15794 |
Abstract | The respiratory muscle pressure generation and inspiratory and expiratory neuromuscular recruitment patterns in younger and older men were compared during exercise, alongside descriptors of dyspnea. Healthy younger (n = 8, 28 ± 5 years) and older (n = 8, 68 ± 4 years) men completed a maximal incremental cycling test. Esophageal, gastric (Pga) and transdiaphragmatic pressures, and electromyography (EMG) of the crural diaphragm were measured using a micro-transducer and EMG catheter. EMG of the parasternal intercostals, sternocleidomastoids, and rectus abdominis were measured using skin surface electrodes. After the exercise test, participants completed a questionnaire to evaluate descriptors of dyspnea. Pga at end-expiration, Pga expiratory tidal swings, and the gastric pressure–time product (PTPga) at absolute and relative minute ventilation were higher (p < 0.05) for older compared to younger men. There were no differences in EMG responses between older and younger men. Younger men were more likely to report shallow breathing (p = 0.005) than older men. Our findings showed younger and older men had similar respiratory neuromuscular activation patterns and reported different dyspnea descriptors, and that older men had greater expiratory muscle pressure generation during exercise. Greater expiratory muscle pressures in older men may be due to compensatory mechanisms designed to offset increasing airway resistance due to aging. These results may have implications for exercise-induced expiratory muscle fatigue in older men. |
ANZSRC Field of Research 2020 | 420702. Exercise physiology |
Byline Affiliations | School of Health and Medical Sciences |
Centre for Health Research | |
Institute for Resilient Regions | |
Griffith University | |
Nottingham Trent University, United Kingdom | |
Department of Health, Queensland | |
Hamburg University of Technology, Germany | |
University of Cape Town, South Africa |
https://research.usq.edu.au/item/z0yv9/the-effects-of-age-on-dyspnea-and-respiratory-mechanical-and-neural-responses-to-exercise-in-healthy-men
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Physiological Reports - 2023 - MacAskill.pdf | ||
License: CC BY 4.0 | ||
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