Rehabilitation and Therapy Commons^™

The Effects Of Repetitive Drop Jumps On Impact Phase Joint Kinematics And Kinetics, Joshua T. Weinhandl, Jeremy D. Smith, Eric L. Dugan

Kinesiology Faculty Publications and Presentations

The purpose of the study was to investigate the effects of fatigue on lower extremity joint kinematics, and kinetics during repetitive drop jumps. Twelve recreationally active males (n = 6) and females (n = 6) (nine used for analysis) performed repetitive drop jumps until they could no longer reach 80% of their initial drop jump height. Kinematic and kinetic variables were assessed during the impact phase (100 ms) of all jumps. Fatigued landings were performed with increased knee extension, and ankle plantar flexion at initial contact, as well as increased ankle range of motion during the impact phase. …