Clinical Research Directory

Inclusion Criteria: 1. Age 18-24 years; 2. At least 3 years of systematic soccer training; 3. No history of severe lower-limb sports injuries within the past 6 months (defined as injuries resulting in ≥4 weeks of training cessation); 4. No participation in any form of repeated sprinting or high-intensity interval training programs during the 2 months prior to the study. Exclusion Criteria: 1. Presence of any cardiovascular, metabolic, or musculoskeletal conditions that may affect testing or training; 2. Inability to guarantee attendance during the study period (expected number of absences \> 2).