Comparison of the Effect of Different Inspiratory Loads on Diaphragmatic Function in Healthy Individuals

University of Vigo

Status: Active, not recruiting

Conditions: Healthy Volunteers

Study type: Observational

Funder types: Other

Identifiers

NCT07143721

Muscle training

Details and patient eligibility

About

This pilot study aims to evaluate how the diaphragm responds to different inspiratory muscle training loads using ultrasound in healthy individuals. The observational, cross-sectional research seeks to determine whether ultrasound measurements of diaphragm movement and thickness can more effectively guide load prescription, thereby optimizing the benefits of inspiratory training. Twenty healthy participants, of both sexes, aged 18 to 35 years, will be recruited through outreach at the Faculty of Physiotherapy at the University of Vigo. The assessment will include spirometry, maximum inspiratory pressure (MIP) measurement, and ultrasound evaluations of the diaphragm at various loads (10%, 30%, 50%, and 70% of the MIP). Data will be analyzed to understand how diaphragm mobility, thickness, and contraction velocity vary according to load, with the goal of improving training prescription and adjustment. The study adheres to the ethical principles of the Declaration of Helsinki and ensures strict confidentiality and participant anonymity. The results will contribute to the understanding of non-invasive diaphragm assessment and its role in enhancing respiratory and physical performance.

Enrollment: 10 estimated patients

Sex: All

Ages: 18 to 35 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

Healthy adults aged 18 to 35 years

No history of neuromuscular, cardiovascular, respiratory, or musculoskeletal diseases that could limit participation

Not currently on medication affecting muscle function

Willing to provide informed consent

Exclusion criteria

Pregnant women

Recent thoracic or abdominal trauma (within the last 3 months)

Respiratory symptoms in the last two weeks

Conditions preventing performing forced inspiratory maneuvers

Recent respiratory muscle training (within the last 6 months)

Trial design

10 participants in 1 patient group

Healthy adults undergoing inspiratory muscle training at varying intensities

Description:

Ultrasound assessment of diaphragm movement and thickness, spirometry, maximum inspiratory pressure measurement, breathing exercises at different load intensities.