I got a really good question on the blog about a method of swinging taught in the 1970s. It was called "square to square." The writer wanted me to juxtapose or compare the biomechanics of the two swings.
The "square to square" swing is where you're told to keep the clubhead square to the aiming line as long as possible in the backswing.
Well, your body doesn't work that way. In the Surge Swing our clubface and our hands are square at setup. With our palms perpendicular to the ground. But as we go into the catcher's mitt and up the tree our arms naturally rotate. With the "square to square" swing, we're putting all kinds of strain on the body and will likely have to go flat at the top of the backswing.
Check out this video and you can easily see the difference.