Acute Effects of Inspiratory Muscle Load on Diaphragmatic Recovery in Athletes

Inclusion Criteria: * Male and female professional basketball players aged between 18 and 35 years. * Holding a valid federation license at the autonomous or higher competitive level. * A minimum of 3 consecutive seasons of competition in official FEB, FIBA, or equivalent regional leagues. * Regular training frequency of ≥4 sessions per week over the past 6 months. * No previous experience with inspiratory muscle training. * Ability to understand study procedures and provide written informed consent. Exclusion Criteria: * History of chronic respiratory, neuromuscular, or cardiovascular disease. * Musculoskeletal injury limiting inspiratory effort or physical participation (current or within the past three months). * Previous thoracic or abdominal surgery. * Current smokers. * Use of pharmacological treatments that could affect respiratory or muscular function. * Participation in another interventional study within the past 4 weeks. * Inability to understand or follow study instructions. * Tympanic membrane perforation or middle/inner ear pathology. * Pregnancy or postpartum period within the last 6 months.