I would recommend the following drill whether or not you are a left-dominant swinger or right-dominant – in other words, swinging with the leading arm only will definitely aid your swing mechanics, whichever side you’re dominant.
In fact, I remember when John Daly had his “Daly Planet” show on the Golf Channel back around 2005 or so – he showed his warm-up one time, and he always warmed up hitting wedges with his left arm only.
I’ve been looking for a good left-handed swing action to illustrate the isolated arm swinging the golf club, and I remembered seeing Mike Austin’sdemonstration of it in the Pico Rivera video.
Now, I’ve been saying for years, since I finished the MCS Golf Swing model especially, that the only real difference between the Mike Austin swing model and that of MCSis in the stance and head motion during the back pivot.
I’ve been on the shelf for swinging for nearly a week now, due to the cracked or badly bruised ribs I incurred on one of my cough syncope falls.
I have been limited to easy swinging, just practicing the setup, making sure of the position and then making the easy motions at around 40-50% – hard enough to engage all of the muscles but easy enough not to strain the ribs.
Because of the nature of the difference between the body and actual machines, it’s not a perfect analogy, but you can consider this – when used properly, the leading side produces leverage for the down swing that is akin to a pulley or winch, which emulates the gear action of a machine.
I have a simple gif. I created a little less than 2 years ago to demonstrate the role of gravity in the down swing, but I can’t find the posting for which this gif. was created, so let’s just do it here and now.
If I’ve learned anything about models and motion in my near-14 years of research and analysis on the golf swing, it’s that the simpler, the better, with one caveat – retaining mechanical soundness or correctness.
Which means, the less moving parts you have in the model, the better it will function, until you remove too much and make it mechanically-unsound.