2026-09-28 · Birdia Blog

Why Don't I Extend My Arms After Impact?

Extension is a result, not a move

Extension toward the target isn't manufactured by consciously straightening the arms. It shows up when the body keeps turning through the ball and the hands arrive at impact ahead of the clubhead. Ben Hogan, in Five Lessons, describes a downswing led by the hips: the body rotates first and the arms trail behind. In his model, the right arm is still slightly bent at impact and only fully straightens afterward, while the body keeps rotating. If rotation stalls, that post-impact extension has no room to happen.

The data that confirms this is angle of attack. With irons, the club must still be descending at contact and bottom out past the ball. TrackMan (Ball Flight Laws) puts the PGA Tour average at roughly -4° of attack angle with a 6-iron. That forward low point is only possible if the hands and chest keep moving toward the target. A golfer who flips the wrists usually moves the low point behind the ball and pulls the arms in right after impact.

The three most common causes

• Chicken wing (bent left elbow): the body stops, the hands get ahead of the chest, and the left elbow folds to let the club pass. It's the most visible symptom of a lack of extension.
• Scooping/flipping: you're trying to lift the ball with your wrists. The clubhead passes the hands, the arc shortens, and the arms collapse back toward the body.
• Early extension: the pelvis slides toward the ball on the downswing. The arms run out of room and have to bend to avoid stubbing the club. TPI lists it as one of the most common swing characteristics among amateurs, almost always tied to hip mobility or a learned pattern.

Rushing the transition is usually behind all three. John Novosel, timing hundreds of tour swings on video, found a backswing-to-downswing ratio of 3:1 (Tour Tempo). If you rush the transition with your arms, the body doesn't have time to lead the downswing and the arms release early.

How to get your extension back

1. Half-finish swings: with a 7-iron, hit three-quarter shots and freeze the position when your hands reach hip height. Both arms should be straight, the club pointing at the target, and your chest facing it. If the left elbow is bent, the chest stopped turning.

2. Connected triangle: David Leadbetter, in The Golf Swing, insists that the arms and body work in sync. Keep the triangle formed by your arms and shoulders at address and let it rotate with your torso well past impact, without the arms getting ahead of it.

3. Hip-led downswing: following Hogan, start the downswing by turning the hips toward the target before the arms pull. Practice it slowly, counting Novosel's 3:1 tempo.

4. Hip gap drill: if early extension is your issue, practice with a chair or a bag touching your glutes at address and keep the contact through the downswing. If you feel restriction or physical discomfort while rotating, check with a physical therapist or doctor before forcing the movement.

With Birdia you can record your swing from your phone: it splits the four phases on-device, and at the finish it flags whether your arms are fully extended or the elbow has folded, so you can check whether the drill is actually changing anything.

Frequently asked questions

Should I consciously straighten my arms after impact?

No. Straightening them on purpose usually produces a stiff, pushed swing. Extension should come from the chest and hips continuing to rotate toward the target; focus on rotation and getting your hands ahead of the ball, and the arms will straighten on their own.

Are chicken wing and lack of extension the same thing?

Almost, but not quite. Chicken wing is the most common form of not extending: the left elbow bends after impact. You can also lose extension through a wrist flip or early extension of the pelvis, even if the elbow looks straight on video.

Does lack of extension affect distance?

Yes, quite a bit. When the arms collapse, the low point of the arc either barely moves forward or stays behind the ball, the attack angle loses the negative degrees TrackMan measures on tour pros with irons, and contact suffers: thin shots, fat shots, and weak, high ball flights. ## Fuentes - Ben Hogan — Five Lessons: The Modern Fundamentals of Golf. - David Leadbetter — The Golf Swing. - TrackMan — Ball Flight Laws. - John Novosel — Tour Tempo. - TPI (Titleist Performance Institute) — Swing Characteristics: Early Extension.