Completed

Breath-Stacking and Ventilatory Muscle Strength

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What is being tested

Breath-Stacking

Other
Who is being recruted

Muscular Diseases+6

+ Musculoskeletal Diseases

+ Nervous System Diseases

From 18 to 24 Years
+2 Eligibility Criteria
See all eligibility criteria
How is the trial designed

Other Study

Interventional
Study Start: September 2017
See protocol details

Summary

Principal SponsorFederal University of Health Science of Porto Alegre
Last updated: January 27, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: September 1, 2017

Actual date on which the first participant was enrolled.

Initially, participants will be submitted to a learning session on the evaluation of ventilatory muscle strength and the breath-stacking technique. Between 24-72 hours after the learning, the evaluation of the muscular muscular strength will be performed through the maximal inspiratory pressure (MIP) and the maximum expiratory pressure (MEP). PI max will be measured from a maximum expiration; While PE max will be measured from a maximum inspiration, using a digital manovacuometer (MVD 300®)

Official TitleBreath-Stacking and Ventilatory Muscle Strength
NCT03258944
Principal SponsorFederal University of Health Science of Porto Alegre
Last updated: January 27, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.
Design Details

34 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Other Study

Some studies explore topics that don't fall into a specific category. These might include innovative research, new technologies, or emerging healthcare areas.

Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

From 18 to 24 Years

Range of ages for which participants are eligible to join.

Healthy volunteers allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

Muscular DiseasesMusculoskeletal DiseasesNervous System DiseasesNeurologic ManifestationsPathologic ProcessesSigns and SymptomsPathological Conditions, Signs and SymptomsMuscle WeaknessNeuromuscular Manifestations

Criteria

1 inclusion criteria required to participate
No signs and symptoms of pulmonary diseases, normal ventilatory muscle strength and agreement to participate and sign the informed consent form.
1 exclusion criteria prevent from participating
Presenting neuromuscular diseases, claustrophobia, ruptured eardrum, history of spontaneous pneumothorax and playing wind instruments or being a singer. Sample loss will be considered as non-attendance at all training sessions.

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Treatment Groups
Study Objectives

One single intervention group is designated in this study

This study does not include a placebo group 

Treatment Groups

Group I

Experimental
Participants will be seated, with their elbows resting on the table, holding the face mask attached to a T-tube and a one-way valve. They will be instructed to inspire and force the expiration inside the mask. The training will be conducted three times a week for a period of four weeks, totaling twelve sessions. The breath-stacking application protocol will consist of three three-minute series, with a three-minute recovery interval between each series, obtaining a total time of fifteen minutes in each session

Study Objectives

Primary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 1 location

Suspended

Universidade Federal de Ciências da Saúde de Porto Alegre

Porto Alegre, BrazilOpen Universidade Federal de Ciências da Saúde de Porto Alegre in Google Maps
CompletedOne Study Center