Ventilatory Muscle Training by Breath-Stacking in Healthy Youngsters

Breath-Stacking and Ventilatory Muscle Strength

In several diseases in which muscle weakness is a determining factor for morbidity and mortality, inspiratory muscle training has been shown to be useful in improving the function of ventilatory muscles, delaying or minimizing the development of complications due to the reduction of inspiratory muscle strength.

The breath-stacking technique emerges as an easily applicable alternative, and it can be used in poorly collaborative patients. The technique described in the literature aims to increase pulmonary volumes.

This gain occurs with the coupling of a silicone mask on the patient's face, a unidirectional valve and with the expiratory branch occluded. Thus, inspirations occur sequentially in this medium, generating pulmonary hyperinflation and increasing the contractility power of the expiratory muscles, which are fundamental for coughing. This hyperinflation also improves the peripheral air distribution in the lungs by increasing intrathoracic pressure.

The objective of this study is to evaluate the effect of the breath-stacking (BS) technique on the ventilatory muscle strength of young and healthy individuals.

Study Overview

• Status: Completed
• Conditions: Muscle Weakness
• Intervention / Treatment: Other: Breath-Stacking

Detailed Description

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®)

• Study Type: Interventional
• Enrollment (Actual): 34
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Brazil
  • RS
    • Porto Alegre, RS, Brazil, 90050-170
      • Universidade Federal de Ciências da Saúde de Porto Alegre

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 24 years (ADULT)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• No signs and symptoms of pulmonary diseases, normal ventilatory muscle strength and agreement to participate and sign the informed consent form.

Exclusion Criteria:

• 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

How is the study designed?

Design Details

• Primary Purpose: OTHER
• Allocation: NA
• Interventional Model: SINGLE_GROUP
• Masking: NONE

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

EXPERIMENTAL: Breath-Stacking; 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

Other: Breath-Stacking; 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.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Ventilatory Muscle Strength	Maximum inspiratory and expiratory pressure	four weeks

Collaborators and Investigators

• Sponsor: Federal University of Health Science of Porto Alegre

Study record dates

Study Major Dates

• Study Start (ACTUAL): September 1, 2017
• Primary Completion (ACTUAL): November 1, 2017
• Study Completion (ACTUAL): December 1, 2017

Study Registration Dates

• First Submitted: July 21, 2017
• First Submitted That Met QC Criteria: August 21, 2017
• First Posted (ACTUAL): August 23, 2017

Study Record Updates

• Last Update Posted (ACTUAL): January 18, 2018
• Last Update Submitted That Met QC Criteria: January 16, 2018
• Last Verified: January 1, 2018

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Pathologic Processes; Nervous System Diseases; Neurologic Manifestations; Musculoskeletal Diseases; Muscular Diseases; Neuromuscular Manifestations; Muscle Weakness
• Other Study ID Numbers: VMTBS- HY

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No