In this discussion, we provide video perspectives on the critical transition from the front and rear. Below are videos of each view. Click on an image or "Dial-Up Modem" to activate the QuickTime video. Each video illustrates the two flex movements, arm and body. The flex movements are synchronized as seen in the flex video below, so some exploration of their execution is in order.

Front View	Rear View	Flex
Dial-Up Modem	Dial-Up Modem	Dial-Up Modem

Regardless of your grip, these movements perform the same function, to align the racquet path and stabilize the stroke so that a powerful blow can be delivered in the strike stage. Grip variations result in variations in the degree of flex in the arm and body. Of particular note is how you exit the acceleration stage so that, at the strike stage, the racquet path can be "straightened out" to ensure clean contact with the ball.

The adjustment needed to "rectify" or arrest the rotational component of the acceleration stage is the subject of our next lesson.

The examples above illustrate some variations due to grip and height of the ball. For professional play, all variations are needed if you are to be able to adapt to the diverse circumstances of the rally.