Figure 1: When using a conventional batting tee, players tend to lunge forward, on top of their front leg. Hip rotation fails to occur, and bat speed is greatly diminished.
Figure 2: The resistor bar on the Stay Back tee is set to the down position to act as a conventional tee. Once again, the batter is out on his front leg, generating power with nothing but his arms. Stepping into the ball in this manner gives the illusion of power.
Figure 3: With the resistor bar placed back in the normal position, the batter's front foot moves on its own in the stride, and the head and shoulders stay back in a more centered position.