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

Condition(s) studied

Study 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.

Eligibility

Primary outcome measure(s)

• 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.

Trial sites (1)

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