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Updated: Jan 28, 2026
Home-Based Prescribed Pulmonary Exercise in Patients with Stable Chronic Obstructive Pulmonary Disease
Published on: August 24, 2019
Inspiratory muscle training improves autonomic modulation and exercise tolerance in chronic obstructive pulmonary
Ana Lídia Carvalho Cutrim1, Ana Amélia Machado Duarte2, Antonio Carlos Silva-Filho3
1Laboratory of Cardiovascular Adaptations to Exercise - LACORE, Universidade Federal do Maranhão, São Luís, Brazil; Programa de Pós-Graduação em Saúde do Adulto - PPGSAD, Universidade Federal do Maranhão, São Luís, Brazil; Cardiopulmonary Rehabilitation Center, Universidade Federal do Maranhão University Hospital 'Presidente Dutra', São Luís, Brazil.
Objectives:
We aimed to evaluate the effect a regular inspiratory muscle training program on autonomic modulation measured by heart rate variability, exercise capacity and respiratory function in chronic obstructive pulmonary disease subjects (COPD).
Design:
Single-center controlled study, with balanced randomization (1:1 for two arms).
Setting:
A COPD reference hospital localized in Sao Luís, Brazil.
Participants:
22 COPD subjects joined the study.
Interventions:
Three times a week for four weeks inspiratory muscle training (IMT) at 30% of PImax.
Main Outcome Measures:
Pulmonary capacities and inspiratory pressure, total six-minute walk test and, cardiac autonomic modulation.
Results:
The intervention group showed improvements in the cardiac autonomic modulation, with increased vagal modulation (total variability and HF [ms2; adjusted p < 0.05]); increased expiratory and inspiratory capacities and, increased distance in the 6-min walk test.
Conclusion:
12 weeks of IMT at 30% of the maximal inspiratory pressure increased cardiac autonomic modulation, expiratory and inspiratory and exercise capacity in COPD subjects.
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