Back in 97 I received a golf cerification in the “Swing Reaction System”, from Nell Chasan. It may be helpful for the pro as well. He discussed planes of movement, muscle engagement, and repetitive learning. You may find him online. I understand he has a book and videos.
Thanks for tweeking that memory,
I’ve been using the TRX with some of our members who play golf.
The exercises that I have them perform provide a proprioceptive stimulus that I find they don’t achieve with other modalities.
May not be an “advanced” source per se, but those that I have trained have found that it has improved their performance on the course.