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Completed

NCT Number: NCT06245928

The Effects of Individualized Respiratory Exercise Device in Healthy Individuals

Respiratory exercise devices can be grouped as respiratory muscle training (RMT) devices and incentive spirometers (IS). IS can improve pulmonary ventilation using visual feedback but cannot increase respiratory muscle strength. RMT devices strengthen the respiratory muscles by their resistance mechanisms but they cannot provide visual feedback. It has been stated that RMT increases exercise performance in healthy individuals. RMT devices usually allow only one of inspiratory muscle training or expiratory muscle training. The need to acquire 2 devices for combined training increases the cost. It is seen that the RMT devices available in Turkey do not allow combined training and a significant part of them do not offer sufficient loading range.

The aims of the project are; to develop a multifunctional individualized respiratory exercise device originating in Turkey, and to analyze the clinical effects of an individualized respiratory exercise device on pulmonary function, respiratory muscle strength, and functional capacity in healthy individuals. The device to be developed in this project will be the first multifunctional respiratory exercise device originated in Turkey. The device will have the clinical features of IS and RMT devices and can be individualized according to the desired purpose. With the same device, the individual will be able to both improve the ventilation of the lungs like the IS and strengthen the respiratory muscles in the direction of inspiration and/or expiration with wide loading intervals.

A total of 46 healthy individuals will be included in the study. The healthy individuals included in the study will be randomly divided into two groups experimental group (n=23) and control group (n=23). The individuals in the experimental group will be trained with an individualized respiratory exercise device for 5 days a week for 8 weeks. The individuals in the control group will be trained with Threshold® IMT + Threshold™ PEP training for 5 days a week for 8 weeks. In both groups, pulmonary function, respiratory muscle strength, and functional capacity will be assessed before and after the 8 weeks of training.

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Key information

Conditions

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Biruni University

Istanbul, Turkey (Türkiye)

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Being between the ages of 18-65
  • Answering "No" to the general health questions of the Exercise Readiness Questionnaire for all

Exclusion criteria

  • Being an amateur or professional athlete who does sports-specific training at least 2 times a week
  • Having a chronic disease
  • Having history of spontaneous or trauma-related pneumothorax
  • Having pathologies related to the middle ear (such as tympanic membrane rupture, otitis)
  • Receiving routine medical treatment other than vitamin supplements for any reason

Treatment and study plan

Individualized Respiratory Exercise Device

Device

The Individualized Respiratory Exercise device will include both inspiratory muscle training, expiratory muscle training, and intensive spirometer features.

Threshold® IMT + Threshold™ PEP

Device

The Threshold® IMT device allows inspiratory muscle training and the Threshold™ PEP device allows expiratory muscle training.

Primary outcomes

  1. Maximal Inspiratory Pressure (MIP)

    Time frame: 8 weeks

    Maximal Inspiratory Pressure will be measured in accordance with ATS/ERS criteria using an electronic, mobile, (MicroRPM, Micro Medical; UK) intraoral pressure measuring device. Three measurements will be repeated for each maneuver and the highest value recorded as cmH2O.

  2. Maximal Expiratory Pressure (MEP)

    Time frame: 8 weeks

    Maximal Expiratory Pressure will be measured in accordance with ATS/ERS criteria using an electronic, mobile, (MicroRPM, Micro Medical; UK) intraoral pressure measuring device. Three measurements will be repeated for each maneuver and the highest value recorded as cmH2O.

  3. Forced Vital Capacity (FVC)

    Time frame: 8 weeks

    Forced Vital Capacity will be measured before six-minute walk test according to the guideline of ERS.

  4. Forced Expiratory Volume in 1 second (FEV1)

    Time frame: 8 weeks

    Forced Expiratory Volume in 1 second will be measured before six-minute walk test according to the guideline of ERS.

  5. Peak Expiratory Flow (PEF)

    Time frame: 8 weeks

    Peak Expiratory Flow will be measured before six-minute walk test according to the guideline of ERS.

  6. Forced Expiratory Flow 25-75% (FEF25-75)

    Time frame: 8 weeks

    Forced Expiratory Flow 25-75% will be measured before six-minute walk test according to the guideline of ERS.

  7. Spiropalm 6-minute Walk Test

    Time frame: 8 weeks

    The 6-minute Walk Test will be performed with Spiropalm 6 DYT (Cosmed, Spiropalm 6MWT) according to ATS guidelines. Walking distance, minute ventilation, respiratory rate, inspiratory capacity and breathing reserve will be recorded.

Secondary outcomes

  1. Convenience of Device Use

    Time frame: 8 weeks

    A 5-point Likert scale will be used to question the convenience of use of the devices used. Scoring will be determined as 1- "very difficult to use", 5- "very easy to use".

Sponsors and collaborators

Lead sponsor

Biruni University

Other

Collaborators

  • The Scientific and Technological Research Council of Turkey

Registry information

Official study title

Development of an Individualized Respiratory Exercise Device Originated in Turkey and Investigation of Its Clinical Effects on Healthy Individuals

Important dates

Study start
2024
Primary completion
2025
Study completion
2025
First posted
Feb 7, 2024
Registry last updated
Dec 15, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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