Biomechanical characteristics of plyometric accentuated eccentric loading in youth athletes

<p>This PhD Thesis investigates the biomechanical characteristics of plyometric accentuated eccentric loading (AEL) in youth athletes. Conducted within the field of sport and exercise science, the thesis explores how handheld dumbbell AEL influence system and joint level mechanics during countermovement jumps. Using force platform and three-dimensional motion capture analyses, the research compares numerical integration techniques, examines the effects of familiarisation on measurement reliability, and evaluates centre of mass and lower limb joint-level responses across progressive loading conditions. The findings enhance understanding of how eccentric-focused training methods can be safely and effectively integrated into long-term athlete development programmes. The work provides novel insights for strength and conditioning practitioners, coaches and researchers seeking to optimise training strategies that improve physical performance and movement efficiency in young athletes. </p>