How To Keep Your Left Arm Straight In The Golf Swing (Without Forcing It)

Do you try to keep your left arm straight in the golf swing, only to feel it collapse at the top and scoop through impact? You are not alone. It is one of the most common things I see on the range, and the harder golfers try to force it, the worse it gets.

In this post I'll break down why the lead arm looks straight in a good swing, why locking it out backfires, and the simple drills I use to help players get a straight left arm without trying. Watch the video first, then use this post as your practice guide.

Why Forcing A Straight Left Arm Backfires

Freeze-frame a tour player at the top or at impact and the left arm looks straight. The same is true at the moment of impact in tennis, baseball and cricket. But nobody plays those sports with locked, tense arms from the start just to get that look at contact.

That is exactly where most golfers go wrong. They try to hold the left arm dead straight for the entire swing, which builds tension through the arms and body. The arm separates off the chest, the upper back rounds, and the arm starts moving across the body until mobility runs out.

At that point everything breaks down at the top, and on the way back to the ball you fall into a scooping pattern. The result is the opposite of what you wanted: no straight left arm at impact at all.

Key Points For A Straight Lead Arm

1. Straight is a result, not a goal. A straight left arm comes from hinging your wrists correctly and turning your body. You never need to try to hold it straight.

2. Hinge and turn creates the position. Stand tall, hinge your wrists, rotate your chest and bend into posture. The lead arm is straight without any effort to keep it there.

3. The swing is a lot of body turn and not much arm pull. If you set the hands and arms and simply turn, it looks like a full backswing. Pulling the arms around the body is what breaks the structure.

4. Locking out costs you width. Golfers who force the arm straight usually lose width at the top, and that shows up as poor contact at impact.

5. Start long and relaxed. The best players hold the club securely, but their arms hang long and relaxed at address. Lock anything out and you can see the arms and shoulders tense up straight away.

If you want to go deeper on wrist hinge, read Exactly When (and How) To Hinge Your Wrists in the Backswing.

Drills To Keep Your Left Arm Straight

Drill 1: Preset Hinge And Turn

Setup: No ball needed. Take your address with a club, or even just your phone or something from your desk, and get into your normal posture.

Execution: Hinge your wrists only. Don't move your arms and don't turn yet. Then focus on the back of your right shoulder (for a right-hander) and turn it towards the target.

Follow Through: Check the position. Your arms haven't moved excessively around your body, you've turned enough, and the lead arm hasn't rolled or broken down. It's straight and you didn't force it.

Tip: Left-handed golfer? Flip it around and turn the back of your left shoulder to the target.

Drill 2: Open Palm Drill

Setup: Grip the club, then open the fingers of your back hand off the grip while keeping the palm attached to the club.

Execution: Turn the back of your right shoulder towards the target and let your back hand hinge back as you go. This lets the wrists hinge while pushing the club away, giving you a structured lead arm and great width.

Finish: Put the fingers back on, then hit a few small chip shots with the same feeling of hinge and turn. Film yourself face on and you'll see a straight left arm.

Tip: It is challenging at first. Go slowly and keep the focus on hinging and turning, not on the arm itself.

Drill 3: Play Dead Arms Check

Setup: At address, let the club go out of your hands and let your arms hang completely relaxed.

Execution: Notice how long and relaxed the arms are. Now place the club back in your hands and keep that exact same feeling, holding the club securely but without locking anything.

Finish: Make your backswing from this relaxed starting point using the hinge and turn feel from the first two drills.

Tip: If your shoulders tighten or your arms change shape when you grip it, you have locked out. Reset and start again.

Want more help building width? Try How To Create More Width in the Backswing (without swaying).

Left Arm FAQs

Should I keep my left arm straight in the golf swing?
It should look straight, but you shouldn't try to hold it straight. Trying to lock it creates tension that makes the arm break down at the top and leads to scooping at impact.

Why does my left arm bend at the top of my backswing?
Usually because you are pulling the arms around your body instead of hinging the wrists and turning. Once the arm runs out of mobility it has nowhere to go but to fold.

How do I get more width in my backswing?
Use the open palm drill. Letting the back hand hinge back while you turn pushes the club away from you and creates width without forcing the lead arm.

Conclusion

A straight left arm is something you earn, not something you force. Start with long, relaxed arms, hinge your wrists, and turn your body. Do that and the lead arm stays straight on its own.

Work through the preset hinge and turn, the open palm drill and the play dead check. Start small, then build up to full swings. You'll strike your irons more consistently and finally stop scooping at impact.

If you want instant feedback on your wrist hinge every swing, check out HackMotion and use code KGGOLF. Or start with my free training.

Watch the full lesson on YouTube: How to Keep Your Left Arm Straight in the Golf Swing! Leave a comment with your biggest left arm struggle and subscribe to the channel for new lessons every week.