Clinical Research Directory

Inclusion Criteria: * Male participants aged 18 to 40 years. * Regular exercise habits, defined as exercising at least 3 times per week, including at least 1 resistance-training session per week, with a stable exercise routine maintained during the previous 3 months. * No cardiovascular, metabolic, neurological, or musculoskeletal diseases that would prevent safe participation in the exercise testing, as assessed by the research team. * Not currently taking medications or dietary supplements that may affect blood coagulation. * No known allergy to natto or soy products. Exclusion Criteria: * Current use of anticoagulant or antiplatelet medications. * History of bleeding disorders or abnormal blood coagulation. * Major surgery within the previous 3 months. * Known cardiovascular, renal, or other major chronic diseases. * History of severe lower-extremity musculoskeletal injury, such as fracture, ligament injury, or meniscal injury, when judged by the research team to make exercise testing inappropriate. * Current acute inflammation, infection, or another physical condition considered unsuitable for participation in exercise. * Participation in high-intensity or systematic plyometric training within the previous month. * Students currently supervised by the principal investigator or individuals with a relevant conflict of interest with the study.