The ability to adjust to changes in speed is determined by the position you are in when the stride foot lands. Adjusting is only possible with a strong base and pressure between the knees. The clips below show the difference in Barry Bonds' swing hitting a fastball and hitting an off-speed pitch. Notice how in both swings he controls his move forward by pulling his hands rearward with his back as he strides. 

• For the fastball, he attacks the ball immediately after the stride foot lands. 

• For the off-speed pitch, he delays the hands but continues forward and sinks into his bent front leg. 

• By keeping his knee inside his front foot and holding his hands back, he is able to keep his head and upper body back and stable. 

• Even though some weight has already shifted to the front leg, the shift is controlled, and he remains balanced over his rear leg. 

• This gives him a strong platform to drive the baseball when it finally reaches the hitting zone.

To handle multiple speeds, you must "control your weight" in order to "control your wait". You control your weight by being in a strong and stacked position when the stride foot lands with your hands back, your head between your feet, and pressure between your knees. Keep the pressure between your knees on your way to the ball, then attack the backside of the baseball.