Trail Arm Pronation

Here's a video to start a discussion about the trail arm pronation. It doesn't line up timing-wise with the lead arm.

For the golf nerds, I have two screenshots of 3D graphs. The first picture shows the timing of when the lead arm starts supinating. The second image is when the trail arm starts pronating. (notice how close to impact that is).

Hi Tyler - Two quick questions:

1) How does the magnitude of lead arm supination & trail arm pronation @ impact compare relative to their respective positions @ address?
2) Is the difference in timing between the lead arm and trail arm why the hands move on the grip during the golf swing?

Thanks Tyler

That was such a helpful post. Your analysis of Colin Morikawa’s swing was also really helpful. I really have started to notice how so many elite ball strikers have the underneath of their right forearms almost pointing to the sky at impact and how bent their right arms still are. All of which corroborates your advice. My worst shot is when I smother the ball low and left because of a too closed face and I suspect that is because I pronate my right forearm too early. I have found much more consistency of face to path since implementing your suggestions.

Much appreciated

Seb
Manchester, GB