[Daryl]

There is a difference between EA and the #1 PP.

With EA, the Right Arm straightens as it would wile performing a Reverse Arm Curl, where the Palm of the Right Hand is facing you as triceps pressure is applied. As the right hand lowers, its path is an Arc, and the hand moves away from the right shoulder with a Stationary Elbow until the Right Arm is Straight. #1 PP is more like a Push-up.

The difference is important. When using the #1 PP, the Right Hand moves away from the Shoulder in a straight line and the Elbow moves in-line with the Hand Path and Stationary Right Shoulder. This causes a straight Right Arm.

Both Actions are performed with the Inside of the Right Wrist Visible to the eye from Start-up to Both Arms Straight. And, its easy to feel that both Actions are very different and can be performed simultaneously for the "Hitter".

So, EA doesn't move the Right Elbow while the #1 PP does. The primary purpose of EA to control the Right Elbow.