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Effects of Inspiratory Muscle Training on Dyspnea Perception During Exercise in Patients With COPD

NCT01900873 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2015-02-03

No results posted yet for this study

Summary

Patients with chronic obstructive pulmonary disease are often limited in their exercise capacity by intolerable shortness of breath (dyspnea). Patients are breathing at high lung volumes during exercise which forces inspiratory muscles to work at a high percentage of their maximal capacity. This increased inspiratory effort has been shown to be independently related to symptoms of dyspnea during exercise in previous research. Eight weeks of high intensity variable flow resistive inspiratory muscle training is hypothesized to reduce inspiratory effort and to decrease neural drive to inspiratory muscles. These factors are hypothesized to jointly contribute to delaying the occurrence of intolerable symptoms of dyspnea and to improve exercise tolerance in these patients.

Conditions

  • COPD
  • Severe Systemic Illness-induced Respiratory Muscle Wasting

Interventions

DEVICE

Inspiratory Muscle Strength Training

IMT will be performed using a variable flow resistive loading device (POWERbreathe®KH1, HaB International Ltd., Southam, UK). The device is able to store training parameters of up to 40 sessions. Most training sessions during this RCT will be performed by patients at their homes without supervision. The intervention group (strength IMT) will perform two daily sessions of 30 breaths. Measurements of Pi,max will be performed every week and training loads will be increased continuously to maintain at least 40-50% of the actual Pi,max values. Each week, one training session will be performed under supervision. Training load will be increased during this session.

DEVICE

Inspiratory Muscle Endurance Training

IMT will be performed using a variable flow resistive loading device (POWERbreathe®KH1, HaB International Ltd., Southam, UK). The device is able to store training parameters of up to 40 sessions. Most training sessions during this RCT will be performed by patients at their homes without supervision. The sham group (endurance IMT) will perform three daily sessions of 30 breaths and will train at a constant inspiratory load of no more than 10% of their initial Pi,max. Each week, one training session will be performed under supervision.

Sponsors & Collaborators

  • Queen's University, Kingston, Ontario

    collaborator OTHER

  • KU Leuven

    lead OTHER

Principal Investigators

  • Daniel Langer · KU Leuven

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Model
PARALLEL

Eligibility

Min Age
40 Years
Max Age
90 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2013-07-31
Primary Completion
2014-09-30
Completion
2014-09-30

Countries

  • Canada

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01900873 on ClinicalTrials.gov