Cited by 220Respiratory Support and MechanismsMuscle Physiology and DisordersCardiovascular and exercise physiology

The Contractile Properties of the Elderly Human Diaphragm

Polkey, M I, Harris, M L, Hughes, P D, Hamnegärd, C H, Lyons, D, Green, M, Moxham, J·1997·American journal of respiratory and critical care medicine

Abstract

It has previously been reported that aging is associated with a substantial decrease in diaphragm strength. To test this hypothesis we studied 15 (10 male, 5 female) subjects with a mean age of 29 (range 21 to 40) and 15 elderly (10 male, 5 female) subjects, mean age 73 (range 67 to 81). We measured transdiaphragmatic pressure (Pdi) during a maximal sniff (Sniff Pdi) and during bilateral cervical magnetic stimulation (CMS) of the phrenic nerve roots (Tw Pdi). Additionally in 17 subjects (9 elderly and 8 young) the Pdi elicited by paired CMS (pTw Pdi) was obtained at interstimulus intervals ranging from 10 to 999 ms (1 to 100 Hz). There was considerable overlap between groups. Mean Sniff Pdi in the elderly was 119 cm H2O compared with 136 cm H2O for the young subjects; this represented a median reduction of 18 cm H2O or 13% (p = 0.05, 95% Cl of difference 0 to 33 cm H2O). Mean Twitch Pdi in the elderly was 26.8 cm H2O compared with 35.2 cm H2O, a median reduction of 8 cm H2O or 23% (p = 0.004, 95% Cl 3 to 13 cm H2O). At 10 Hz the elderly tended to generate a higher fraction of the Pdi obtained at 100 Hz than the young, but this trend did not achieve statistical significance (p = 0.11). We conclude that aging is associated with a reduction in diaphragm strength. However the magnitude of the reduction is small and may be offset by a leftward shift of the force-frequency relationship.

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Crossref · 10.1164/ajrccm.155.5.9154857

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  • A reduction in elastic recoil of the lungs and changes in chest wall deformation give rise to increased functional residual capacity with age.

    “A reduction in elastic recoil of the lungs and changes in chest wall deformation give rise to increased functional residual capacity with age (7, 14, 17).”

    From Aging and Lung Disease (2020) · cites this paper as [17]

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Authors
Polkey, M. I., Harris, M. L., Hughes, P. D., Hamnegärd, C. H., Lyons, D., Green, M., & Moxham, J.
Affiliations
King's College London (GB)
Venue
American journal of respiratory and critical care medicine
Published
1997-05-01
Volume
155
Issue
5
Pages
1560-1564
ISSN
  • 1073-449X (ISSN-L)
  • 1535-4970
OpenAlex
W2125963663
Cited by
219
References
0
Citations by year
2026: 7 · 2025: 8 · 2024: 3 · 2023: 5 · 2022: 12 · 2021: 7 · 2020: 6 · 2019: 19 · 2018: 11 · 2017: 7 · 2016: 13 · 2015: 8 · 2014: 14 · 2013: 8 · 2012: 8
FWCI
5.51
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Respiratory and Critical Care Medicine (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Respiratory Support and Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
Keywords
diaphragm, aging, diaphragm strength, transdiaphragmatic pressure, phrenic nerve stimulation, magnetic stimulation, force-frequency relationship, older adults, respiratory muscle function
MeSH terms
Adult, Aged, Aged, 80 and over, Aging, Diaphragm, Female, Humans, Magnetics, Male, Muscle Contraction, Phrenic Nerve, Physical Stimulation, Pressure, Respiration

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