If swimmers can learn to use their whole arm as an anchor to move...

It’s a simple enough concept, but that doesn’t mean swimmers can easily make it happen.
I like to use strategies that force swimmers to make the change.
Have swimmers take their paddles, but instead of wearing them, have them hold the paddle so that it rests all on the inside of their forearm.
This blocks the wrist from moving.
Now, the whole arm is moving as a unit and that means a bigger, stronger anchor.
If butterflyers can’t hold water at speed, they won’t swim fast.
If we want them to learn this skill, we have to show them how.