The Training Aid That Widens Your Backswing Instantly!

On this episode of the Athletic Motion Golf Podcast, Mike Granato and Shaun Webb reveal something they've spent over 10 years building.

After more than a decade giving 3D lessons, we kept seeing the same fault in 99% of golfers: the trail arm. It over-bends, pulls behind the rib cage, and lowers — and that combination is what sends the club steep and over the top in transition. We tried every training aid out there to fix it, and never loved any of them: they were cumbersome, they didn't fit every arm, and worst of all, most did the work FOR you — so nothing transferred once you took them off.

So we built our own. In this episode we walk through the whole journey...the forearm braces golfers used as a "door stop," the velcroed squeaky dog toys, the adult swimmies (yes, the Nelly Korda ones), and the version with teeth that "chewed up my arm like a shark" — right up to the finished design: the Arm Shark. It gives you two kinds of instant feedback — a tactile give and an audible click — the moment your trail arm bends too much, so you do 100% of the movement yourself. No app, no Bluetooth, just old-school analog pass/fail. In testing we're seeing 30–40° of arm-bend change in just a few swings, and it works for the takeaway, the downswing (staying wide like Hunter Mahan), setup, and short game. It ships with three fins for every arm type and skill level.

This kicks off the next phase of AMG — turning a decade of data into tools that make these concepts tangible in your very next practice session.

👉 Get the Arm Shark: https://armsharkgolf.com

Chapters:
00:00 A role reversal — and something new
00:14 How this all came to be
00:29 The same faults, lesson after lesson, in 3D
00:44 The trail arm: golf's #1 problem
01:24 Over-bent, pulled behind, and lowered
01:49 Why that creates a steep, over-the-top move
01:56 We tried every training aid out there
02:12 The fatal flaw: they do the work for you
02:35 Why the trail side is "out of sight, out of mind"
03:21 The real test: does it transfer without the aid?
04:10 What we wanted: tactile AND audible feedback
05:00 Show & tell: the forearm brace
05:37 Why your forearm can't feel it (the "door stop")
06:04 It actually made arm-lowering worse
06:31 The velcroed squeaky dog toys
07:32 The adult swimmies (yes, the Nelly Korda ones)
07:54 The "cast" problem: it springs back worse
09:01 Making golfers "pay a price": the teeth version
09:45 "It chewed up my arm like a shark"
10:07 Letting Mother Nature design it
10:56 The breaking fin → the audible click
11:17 Introducing the Arm Shark
11:40 How it works: the click and the give
12:24 Fixing the "lawnmower" takeaway
12:42 30-40° of change in a few swings
13:23 Using it for setup & fin rotation
14:20 Three fins: over-bender, pro, and the "Rory" fin
15:25 Multi-size: bicep or forearm, any arm
15:51 So light you can wear it on the course
17:16 The biggest problem in golf, solved analog
17:38 No app, no Bluetooth — just pass/fail
18:08 It becomes a game in a couple swings
18:52 It works in the downswing too (stay wide)
19:13 Hunter Mahan's wide-arm move
19:36 Why not folding = a shallower club
20:21 AMG's next phase: from concepts to tools
22:36 How to get your Arm Shark

#golf #golfswing #golftraining #armshark #golftips #overthetop