Effect of Hydrogen-rich Water During Tapering on Recovery After Functional Overreaching in Basketball Players

The goal of this clinical trial is to evaluate whether hydrogen-rich water supplementation during tapering improves recovery after functional overreaching in competitive male basketball players aged 18-35 years. The main questions it aims to answer are: * Does hydrogen-rich water improve autonomic recovery after functional overreaching? * Does hydrogen-rich water improve recovery in biochemical, performance, and subjective feeling outcomes during tapering? Researchers will compare hydrogen-rich water to placebo (water containing no molecular hydrogen) to determine whether molecular hydrogen improves recovery after accumulated fatigue has been induced by functional overreaching. Participants will: * Complete a training cycle including normal training, functional overreaching, and tapering. * Consume hydrogen-rich or placebo water daily during the one-week tapering period. * Undergo repeated testing of autonomic nervous system, blood biochemical markers, performance, and subjective soreness.

Inclusion Criteria: * Competitive male basketball players. * Signed informed consent. * Completion of entry medical and laboratory screening. Exclusion Criteria: * Acute injury or infection. * History or presence of relevant cardiovascular, respiratory, metabolic, or other disease that may affect the study results. * Use of medication affecting recovery markers or study results.