Neuromuscular Fatigue Assessment in Youth Soccer

This clinical trial investigates neuromuscular fatigue and recovery responses following a standardized soccer-specific fatigue protocol in trained young male soccer players. The study compares the sensitivity of different neuromuscular performance assessments, including the countermovement jump (CMJ), isometric mid-thigh pull (IMTP), and isometric hamstring 90-90 (IH90-90) tests, for detecting fatigue and recovery over time. The main questions the study aims to answer are: * Which neuromuscular assessment is most sensitive for detecting fatigue following soccer-specific activity? * How do force production characteristics change immediately after exercise and during recovery? * Do single-joint and multi-joint isometric assessments demonstrate different recovery patterns? Participants complete a standardized soccer simulation fatigue protocol and perform neuromuscular performance tests before exercise, immediately after exercise, and 24 and 48 hours following the protocol. The findings may help improve fatigue monitoring strategies during congested training and match schedules in soccer players and support approaches aimed at reducing injury risk.