What McIlroy Worked on During His Break

[nevets88]

I was wondering what he was talking about in the video below, obviously something about the transition shallow to steep, but in what context? Interesting insight into his swing in the piece here.

Quote

“When I was that age the move that I'm trying to get back to was more exaggerated at that point, steepened the shaft very much on the way back, shallowed it coming down,” said McIlroy, who has eight top 10s this year but just one victory. “Now it's shallow coming back, and steepened coming down, that's why I get two-way misses left and right.”

https://www.golfdigest.com/story/how-did-rory-mcilroy-spend-his-break-by-watching-video-of-rory-mcilroy