Respiratory Function and Athletic Performance in Professional Soccer Players
Trial statusNot yet recruiting
Trial phaseNot listed
Trial typeObservational
Biological sexMale
Age18-35
SponsorIstinye University
About this trial
This prospective observational study aims to investigate the relationship between respiratory function and multidimensional athletic performance parameters in professional soccer players. The primary hypothesis of the study is that soccer players with enhanced respiratory function and superior respiratory muscle strength will exhibit optimized motor performance outcomes and shorter (faster) reactive reaction times. Investigators will evaluate respiratory muscle strength, spirometric pulmonary functions, dynamic balance, core and abdominal endurance, and reactive visuomotor reaction times during a single testing session within the competitive season.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Participants will be actively competing, licensed professional soccer players. -Participants will be engaged in regular, team-based training and competitive match schedules.
Participants will voluntarily provide written informed consent before any study-related physical performance assessments are conducted.
Disqualifiers
Participants will be excluded if they present with an acute upper or lower respiratory tract infection that could potentially affect pulmonary function or maximal respiratory muscle performance.
Participants will be excluded if they have a documented history of major cardiothoracic surgery.
Participants will be excluded if they have any diagnosed respiratory and/or cardiovascular disorder associated with dyspnea or impaired pulmonary mechanics.
Participants will be excluded if they present with any condition that elevates clinical risk during maximal inspiratory and expiratory pressure assessments.
Trial population
The study population will consist of elite-level athletic professionals, specifically young adult male professional soccer players. Participants will be recruited from a licensed professional football club actively competing in national league training and competition schedules.
Trial design
Design model
Cohort
Time perspective
Prospective
Treatments tested in this trial
Respiratory and Athletic Performance Assessments
Other interventionParticipants will not receive any experimental clinical intervention as part of this observational study. Instead, they will undergo standard, non-invasive physiological and athletic performance screenings during their competitive season. These assessments will include digital respiratory pressure manometry to evaluate maximal inspiratory and expiratory pressures, computerized spirometry to measure pulmonary functions, the Y-Balance Test for dynamic postural stability, the BlazePod wireless LED system for reactive visuomotor reaction times, and sport-specific field tests (isometric plank, 60-second sit-up, and T-drill agility tests) to evaluate core endurance and agility. All measurements will be completed during a single testing session following standardized recovery intervals.
Treatment groups
No treatment groups listed
Trial outcomes
Primary outcomes
1
Maximal Expiratory Pressure (MEP)
Description: Respiratory muscle strength will be assessed using a portable digital respiratory pressure meter. Participants will execute a maximal expiratory maneuver from total lung capacity after full inspiration while wearing a nose clip. The highest reproducible value from at least three technically acceptable trials will be recorded in centimeters of water (cmH₂O).
Time frame
2 hours2
Maximal Inspiratory Pressure (MIP)
Description: Respiratory muscle strength will be assessed using a portable digital respiratory pressure meter. Participants will perform a maximal inspiratory maneuver from residual volume following complete expiration while wearing a nose clip. The highest reproducible value from at least three technically acceptable trials will be recorded in centimeters of water (cmH₂O).
Time frame
2 hour3
Reactive Visuomotor Reaction Time
Cognitive-motor reaction speed will be quantified using a wireless LED pod system arrayed in an equidistant semi-circular matrix. Participants will utilize their dominant lower limb to deactivate randomly illuminated pods as quickly as possible across 10 sets of 22 randomized stimuli. The mean reaction time across the challenge will be recorded in milliseconds (ms).
Time frame
2 hours4
Dynamic Postural Stability (Y-Balance Test)
Functional reach capacity and dynamic balance will be quantified using a standardized Y-Balance Test apparatus. While maintaining a single-leg stance, participants will push indicator blocks in the anterior, posteromedial, and posterolateral directions. The maximum reach distance from three successful trials for each direction will be normalized to leg length and used to calculate a comprehensive Composite Score percentage (%) for both limbs.
Time frame
2 hoursSecondary outcomes
1
Forced Vital Capacity (FVC)
Pulmonary function will be evaluated using a computerized spirometry system in accordance with ATS/ERS guidelines. Participants will perform a maximal inspiratory effort followed by a rapid and forceful expiration sustained until complete exhalation. The highest reproducible value will be expressed both as an absolute volume in liters (L) and as a percentage of predicted reference values (FVC%).
Time frame
2 hours2
Forced Expiratory Volume in 1 Second (FEV1%)
Pulmonary function will be evaluated using a computerized spirometry system in accordance with ATS/ERS guidelines. The volume of air exhaled during the first second of the FVC maneuver will be extracted. The highest reproducible value will be expressed both as an absolute volume in liters (L) and as a percentage of predicted reference values (FEV1%).
Time frame
2 hours3
Peak Expiratory Flow (PEF)
Pulmonary function will be evaluated using a computerized spirometry system in accordance with ATS/ERS guidelines. The maximum flow rate achieved during the forced expiratory maneuver will be measured. The highest reproducible value will be expressed in liters per second (L/s) and as a percentage of predicted reference values (PEF%).
Time frame
2 hours4
Dynamic Abdominal Endurance (60-Second Sit-Up Test)
Dynamic muscular endurance of the abdominal wall will be evaluated using a timed sit-up protocol. From a supine position with knees flexed at 90° and hands crossed over the chest, participants will flex the trunk until the elbows touch the knees, then return to the baseline position. The total number of correctly executed repetitions completed within exactly 1 minute (reps) will be recorded.
Time frame
2 hoursLocations
Sponsors and contacts
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Source ClinicalTrials.gov
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