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The Capital Region of Denmark - a part of Copenhagen University Hospital
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Inspiratory muscle strength and walking capacity in patients with COPD

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Purpose: It has been suggested that patients with inspiratory muscle weakness could benefit from specific inspiratory muscle training (IMT). We aimed to examine the frequency of patients with inspiratory muscle weakness in a Danish hospital-based outpatient pulmonary rehabilitation program, and to evaluate the association between inspiratory muscle strength and peripheral muscle strength and walking capacity. Methods: Maximal Inspiratory Pressure (MIP) was assessed in 97 patients with COPD (39 men, 58 women, mean age years 70 ± 9, forced expiratory volume in 1 s ((FEV 1) = 35 ± 10% pred.). The impact of MIP on knee-extension strength, walking distance, and symptom burden was evaluated using multiple linear regression analyses. Results: The MIP of the patients with COPD was 63 (95% CI 59; 67) cmH 2O and it was significantly reduced compared to gender and age-matched reference values 76 (95% CI 73; 79) cmH 2O (p < 0.001). Seven patients (7.2%) were under the lower limit of normal. MIP was negatively correlated with increasing age, female gender, decreasing knee-extension strength and lower FEV 1% pred. Walking distance was associated with knee-extension strength and it was not associated with MIP. Conclusion: Maximal inspiratory pressure was reduced in patients with COPD but only a few patients had a weak MIP. Whilst MIP was associated with leg muscle strength, it was not associated with walking distance or symptoms.

Original languageEnglish
Article number 1700086
JournalEuropean Clinical Respiratory Journal
Volume7
Issue number1
Number of pages6
ISSN2001-8525
DOIs
Publication statusPublished - 1 Jan 2020

    Research areas

  • chronic obstructive pulmonary disease, Maximal inspiratory strength, physiotherapy, quadriceps strength, walking distance

ID: 58721238