Silva, E.S., Dolonec, A., Cross, M.R., Samozino, P., Rossi, J. & Morin, J. B.
XXX Congress of the International Society of Biomechanics, 27th to 31st of July Stockholm, Sweden
This study examined differences in sprint kinematics and kinetics when unresisted and resisted at slow, medium, and fast relative velocities [60%, 40% and 20% decrease in maximal running velocity (VDEC), respectively]. Fourteen males performed sprints with individual resistive loads applied using a motorized resistance. Kinematics and kineticswere assessed via infrared cameras and force platforms. Significant differences were observed only for: contact time at 40% and 60% VDEC, vertical impulse across all VDEC levels, ankle range of motion and hip angle at toe-off at 60% VDEC. Overall, there were few clear differences between resistive conditions, with those observed seemingly mostly due to velocity changes induced by resistance, rather than the resistance itself.