An interventional study of Inspiratory muscle fatigue group and Inspiratory muscle warm-up group in Sports Physical Therapy, Athletic Injuries and Healthy, sponsored by Sierra Varona SL. Not yet recruiting. Open to participants aged 18 Years to 35 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-07-03.
Sponsored by Sierra Varona SL · Not applicable, Interventional, and Treatment
This randomized controlled trial investigates the acute effects of inspiratory muscle warm-up and fatigue on diaphragmatic function in professional basketball players. Using ultrasound imaging and maximal inspiratory pressure (PIM) assessment, the study evaluates changes in diaphragmatic thickness and respiratory strength before and after specific inspiratory muscle loading protocols. Findings aim to clarify the short-term impact of these interventions on diaphragmatic recovery capacity, with potential implications for respiratory training, performance enhancement, and injury prevention strategies in elite athletic populations.
258 studies on the registry are indexed under Athletic Injuries; 45 are open to participants now.
This study's planned enrollment of 38 is below the median of 44 across 164 interventional studies indexed under Athletic Injuries.
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Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The EG (experimental group) will perform the diaphragmatic fatigue protocol using a specific inspiratory endurance test, in which volunteers, one-on-one, and in a single session, will breathe against submaximal inspiratory loads equivalent to 60% of their MIP (Maximum Inspiratory Pressure) through a threshold valve device. The participants will follow a free pattern of breathing until they are unable to establish flow during at least 3 maximum inspiratory efforts.
Device: Inspiratory muscle fatigue group
The inspiratory muscle warm-up group will perform the protocol of 2 sets of 30 repetitions at 40% of their MIP, one-on-one, and in a single session, breathing against submaximal inspiratory loads using a threshold valve device. The participants will follow a free pattern of breathing until complete the protocol.
Device: Inspiratory muscle warm-up group
The subjects will perform deep inspirations against a threshold device with varying resistances
Also known as: Inspiratory muscle fatigue
The subjects will perform deep inspirations against a threshold device with varying resistances
Also known as: Inspiratory muscle warm-up
Maximal inspiratory pressure
It will be assessed using a Breathare MIP/MEP® (GH Innotek Co., Ltd., Busan, Republic of Korea).The Breathare MIP/MEP® is likely a respiratory pressure meter or manometer designed for measuring respiratory muscle strength. It typically includes a mouthpiece connected to a pressure sensor, and the device measures the force or pressure generated during respiratory maneuvers. The person will be instructed to take a maximal deep breath in, and then exhale to residual volume. After that, they will be asked to inhale forcefully against the resistance provided by the Breathare MIP/MEP®. This measures the strength of the inspiratory muscles. The measures will be expressed in cmH2O.
Time frame: Immediately before intervention, immediately after intervention, 15 minutes post intervention and 30 minutes post intervention
Diaphragmatic thickness and thickening fraction
The linear array probe with a frequency of 3.0-10 megahertz (MHz) is placed perpendicularly to chest wall close to the mid-axillary line which is between the 8th and 10th intercostal space. The thickness of diaphragm is measured at the end of expiration and maximum inspiration for three times and the average values were recorded. The measures will be expressed in centimeters.
Time frame: Immediately before intervention, immediately after intervention, 15 minutes post intervention and 30 minutes post intervention
No study locations are listed for this record.
Plan to share: No — Due to confidentiality and privacy considerations, individual participant data (IPD) will not be publicly available. However, de-identified data can be made available upon reasonable request to the corresponding author, subject to approval and adherence to ethical guidelines. The anonymity of participants will always be strictly maintained.
This study is not yet recruiting, as verified in Jul 2025. You cannot join it, but the record below documents what was studied.
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