Video 1 —— Eccentric overload of the hip flexors. Loading hip flexors this way creates the most amount of torque. Torque = Speed. —— Think trail leg in sprinting, pull the knee forward. #psoas #illiacus —— Video 2 — Hip extension with eccentric overload on hamstring. —— .94 —> .90 flying 10 is the goal. — #speed #sports #athlete #sprint #strength #sprinttraining #football #athletics #kbox #strexbox