Football has evolved as athletes get bigger, stronger, and faster.  As football offense is now more complex, the defense must train to physically play the offender, as well as break-through the blocker to take the seam, hence putting the defender in a position to attack or disrupt the ball carrier. The new TEK Sled moves like a blocker, allowing the defender to work on shocking the offensive player, creating leverage and violently separating or attacking the offender. Today, zone blocking requirements have teammates handling double teams, releasing to take on their next dangerous defender. No current product can simulate the weight, resistance and natural movement of a defender like the new Rogers TEK Sled.