Optimizing Seated Throwing Mechanics: Trunk Control as the Primary Power Lever

Background: Seated throwing athletes operate under unique biomechanical constraints that fundamentally alter power generation and force transfer. Methods: Synchronized motion capture, EMG, and ball-velocity data from 24 elite seated throwers were compared across three levels of trunk stability. Results: High Control athletes achieved higher velocities with significantly reduced joint stress (p < .0001). Low Control athletes showed 27x higher injury incidence. Conclusion: Trunk control is the primary power lever in seated throwing. Targeted trunk training is essential for performance and injury prevention.