Healthy Volunteers
Conditions
Keywords
Diaphragm ultrasound, inspiratory muscle training, respiratory biomechanics, muscle mobility, lung function, breathing exercise, respiratory evaluation, muscle thickness
Brief summary
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.
Interventions
None listed
Sponsors
University of Vigo
Study design
Observational model
OTHER
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 35 Years
Healthy volunteers
Yes
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)
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in diaphragmatic excursion during inspiratory muscle training at varying loads | Day 2: Baseline; Immediately after 10% MIP; Immediately after 30% MIP; Immediately after 50% MIP; Immediately after 70% MIP | Assessment of diaphragmatic excursion using ultrasound at 10%, 30%, 50%, and 70% of maximum inspiratory pressure (MIP). Evaluates the diaphragm's mobility as a primary measure of functional response to different inspiratory loads in healthy individuals. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Diaphragmatic thickness at different inspiratory loads | Day 2: Baseline; Immediately after 10% MIP; Immediately after 30% MIP; Immediately after 50% MIP; Immediately after 70% MIP | Measurement of diaphragmatic thickness using ultrasound at 10%, 30%, 50%, and 70% of maximum inspiratory pressure (MIP). This evaluates muscular response and mobility related to varying inspiratory efforts in healthy subjects. |
| Diaphragmatic contraction velocity at different inspiratory loads | Day 2: Baseline; Immediately after 10% MIP; Immediately after 30% MIP; Immediately after 50% MIP; Immediately after 70% MIP | Assessment of diaphragmatic contraction velocity using ultrasound at 10%, 30%, 50%, and 70% of MIP. Evaluates muscular response and mobility during inspiratory efforts. |
Other
| Measure | Time frame | Description |
|---|---|---|
| Correlation between ultrasound measurements of diaphragmatic function and spirometry parameters | Day 1: Spirometry session, prior to ultrasound evaluations. Day 2: Ultrasound evaluations: Baseline (reposo, pre-load); Immediately after 10% PIM; Immediately after 30% PIM; Immediately after 50% PIM; Immediately after 70% PIM. | Analysis of the relationship between ultrasound measurements of diaphragmatic function (excursion, thickness, and contraction velocity) and spirometry parameters (such as FEV1, FVC, PEF) obtained in a separate session, to evaluate how ultrasound indicators reflect overall respiratory capacity in healthy individuals. |
Countries
Spain
Outcome results
None listed