The distinction between a dynamic (pull through) release and a static release is beginning to blur in my mind. Just to review, a dynamic release is where backward physical movement of the arrow slows but does not ever completely stop at full draw, and the drawing hand ends up behind the neck or fingers touching the shoulder on conclusion of the shot. A static release is where backward movement of the arrow stops at full draw and the drawing hand pretty much stays in place on conclusion of the shot.
Two things that are causing the distinction in my mind to blur are the recent podcast with Joel Turner and my recent tune up session with Rick Welch. Joel is a proponent of the dynamic release, while Rick is a proponent of the static release.
In the podcast with Joel, they discuss expansion, which is why I posted this here. They discuss dynamic expansion, where there is movement of the arrow during the expansion phase, and static expansion, where there is no movement of the arrow. The only reason they make a distinction between the two is that Joel is a proponent of non-anticipatory triggers, and clickers or feather to nose triggers can be used with dynamic expansion, whiler a tab sear or some kind of trigger that is not dependent on any arrow movement is required with static expansion. I see no difference between static expansion and the the static release. To visualize static expansion, imagine standing in a doorway and pressing your hands against the door frame, as you expand (press) you are exerting more pressure on the door frame, but the door frame isn't moving.
In my recent tune up with Rick Welch, he identified my main issue as not maintaining back tension through release. In other words, I was creeping. We went through a number of exercises until he was confident that I could be aware of when I was creeping, and knew what to do about it. People normally don't associate back tension with the static release, but in Rick's view, it is as important in the static release as it is in the dynamic release.
In view of these two experiences, I'm beginning to view the static release and the dynamic release as two sides of the same coin: if you come to full draw and find that no further backward movement of the arrow is possible while you expand, you're using the static release; if you come to full draw and there is some backward movement of the arrow during expansion, then you're using the dynamic release. I think these are the only differences between the two, assuming both are correctly applied.
I thought I was making a choice to use the static release because I shot better that way. Now I'm coming to recognize that it wasn't so much of a choice as a recognition that different bodies work in different ways when shooting the bow.