RecruitingEarly Phase 1Device studyQuadriceps Motor Unit Adaptation to Simulated Knee InjuryThis study investigates how simulated knee injury-via artificial joint effusion or deafferentation-affects quadriceps motor unit behavior in healthy young adults. Participants will complete neuromuscular testing during a single 2-hour lab session. This research seeks to improve understanding of muscle inhibition and inform interventions after real-world knee trauma.