GEARS: Good Players Increase Flexion in the Trail Leg in the Backswing

[JetFan1983]

According to GEARS the trail knee actually gains flexion in the backswing in a good player's swing. Watch here for details on how and when this occurs: 

In the example pro they used, knee flexion increases four degrees before the clubhead even moves, straightens/loses flex from like P1.2 to P3, then begins to increase flexion again from P3 to P4, for a net gain of 5.28 degrees throughout the entirety of the backswing.

I actually didn't know this until seeing their video last night, uploaded by Athletic Motion Golf on September 25th. 

What do you guys think? I think it's important to note that the knee does technically straighten/lose flex during most of the backswing.

[iacas]

You should follow me on Instagram, Constantine! 🙂 

Erik J. Barzeski (@iacas) • Instagram reel

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GEARS shares expert advice on golf swing technique, focusing on the critical backswing phase. Tour winners and major champions reveal the key to a precise and powerful swing, highlighting the importance of...

Also, if you look at P1 and P4, it's often a bit more flexed, but many extend a little in the backswing and then re-gain flex as they start to transition forward late in the backswing.

Which you said toward the bottom, but I wanted to call it out again.

[JetFan1983]

7 hours ago, iacas said:

You should follow me on Instagram, Constantine! 🙂 

Erik J. Barzeski (@iacas) • Instagram reel

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GEARS shares expert advice on golf swing...

Also, if you look at P1 and P4, it's often a bit more flexed, but many extend a little in the backswing and then re-gain flex as they start to transition forward late in the backswing.

Which you said toward the bottom, but I wanted to call it out again.

Ahhh, I deleted my Instagram in 2019 because I wasn’t healthy for golf at the time and yet my entire feed was golf. Had to let it go to stay sane. But I saw your video via my friend’s Insta. Dang, really good share. Cool to see what other pros do with it.

[iacas]

Yeah, there's a topic here I've been meaning to supplant for a few years now. I still teach a newer player to extend a bit (because separating hip extension from knee extension is tougher for them, and because many of them don't turn a ton), but even among those players I've been teaching it differently for a few years now with the trail hip "push" back stuff and not turning your trail leg into "a pole."

[dennyjones]

4 hours ago, iacas said:

but even among those players I've been teaching it differently for a few years now with the trail hip "push" back stuff and not turning your trail leg into "a pole."

Could you elaborate on this?  

[iacas]

10 hours ago, dennyjones said:

Could you elaborate on this?  

In what way? Probably not in this topic.

Erik J. Barzeski (@iacas) • Instagram reel

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55 likes, 2 comments - iacas on September 10, 2025: "A LOT of golfers thrust their pelvis toward the golf ball in the backswing. This video shows an exaggeration of the opposite: pushing the trail side of your body...