Originally Posted by Raul_SJ
In an earlier thread, that has since been deleted, you mentioned that your students improved when presented with the "pulling across" image.
Congratulations on this.
But what do you believe is physically changing with their stroke?
The change from conventional to modern is that you use more your major muscle groups in modern and you have a freer posture, while conventional is more elaborate and involves too much muscles that are smaller and therefore weaker (and that includes rotational forces on your hips and knees at the end of the stroke, making you more vulnerable to injury).