What Does the Right Arm Do in the Golf Swing?

The role of the right arm in the golf swing is often misunderstood, leading many players down a long road of frustration, power leaks, and inconsistency. Forget the common advice to use it as your dominant "power arm." This guide breaks down exactly what your trail arm(the right arm for a right-handed golfer) should be doing in the backswing, the downswing, and through impact, helping you turn it from a source of confusion into a structured, powerful part of a repeatable swing.

The Right Arm: Your Supportive Co-Pilot, Not the Engine

Before we go into the mechanics, we need a fundamental mind shift. Your primary power source in the golf swing doesn't come from your arms, it comes from the rotation of your body - your hips and torso coiling and uncoiling. Your arms and the club are along for the ride. The right arm's job is not to generate power but to transfer it efficiently.

Think of it as a disciplined supporter. Its role is to help set the club on the right path, maintain the proper structure throughout the backswing, and then deliver the clubhead squarely to the ball by releasing the energy your body has created. When the right arm tries to take over and create its own power, you get common faults like casting (the dreaded "over the top" move), steepening the club on the downswing, or flipping at the ball, all of which rob you of both distance and accuracy.

Your right arm is the co-pilot. Your body is the engine. Once you build your swing around that relationship, everything becomes simpler.

Setting the Stage: The Right Arm in the Backswing

A good downswing starts with a good backswing. The right arm plays a critical role in setting up the club in a powerful position at the top. This happens in two distinct phases.

The One-Piece Takeaway

The very first move away from the ball should be a "one-piece" motion. This simply means that your shoulders, arms, hands, and the clubhead all start moving away from the ball together, powered by the gentle rotation of your torso. In this initial phase, from setup to about waist-high, the right arm doesn't do much at all. It remains relatively straight, maintaining its connection with your chest.

A good feeling is to imagine a triangle formed by your shoulders and arms at address. During the takeaway, that triangle moves back as a single unit. The right arm should not bend immediately or lift the club independently. If you start the swing by picking the club up with your right hand or folding your right elbow too early, you disconnect your arms from your body's turn, which is the start of an out-of-sync swing.

The Crucial Fold: Creating Width and Structure

Once the club gets about waist-high, the right wrist will start to hinge and the right elbow will naturally begin to fold. This fold is a reaction to the continuing rotation of your body, not an independent action. As your torso keeps turning, your right arm needs to fold to keep the club on the correct path (or plane).

As you approach the top of your backswing, aim for a feeling of your right elbow pointing generally toward the ground. A common destructive fault is the "flying right elbow," where the elbow lifts up and away from the body, pointing behind you. This gets the club into a "laid off" or "across the line" position, making a consistent downswing nearly impossible.

A fantastic checkpoint at the top of the swing is the "waiter's tray" feel. Imagine you are a waiter carrying a tray of drinks on your right hand. Your right wrist would be hinged back (not bent up or down), and your palm would be facing up toward the sky, supporting the tray. This is precisely the feeling you want with your right hand supporting the golf club at the top of the backswing. It shows you have good width, proper wrist hinge, and a a solid, supportive structure ready to start the downswing.

Unlocking Power: The Right Arm's Role in the Downswing

This is where the magic (or the misery) happens. What the right arm does in the first half of the downswing determines whether you deliver the club with power from the inside or chop down at it from the outside.

The "Slotting" Sensation

The downswing is not initiated by your arms and hands. It's started by the ground up - with a slight shift of pressure to your lead foot and the beginning of your hips unwinding toward the target. What does the right arm do during this initial move? Almost nothing.

The feeling you want is one of a passive drop. As your lower body initiates the downswing, the right arm and elbow should feel like they are simply "dropping" vertically, staying close to your right side as they fall into "the slot." This passive dropping motion gets the club on the correct plane from the inside, a position from which you can generate tremendous speed through impact.

The opposite, and the number one fault for most amateurs, is initiating the downswing by throwing the right shoulder and right arm "over the top." This feels powerful, but it just forces the club onto a steep, out-to-in path, leading to slices, pulls, and weak contact.

Maintaining Lag and Storing Energy

As the right arm drops into the slot, it should try to maintain its "waiter's tray" bend for as long as possible. The angle between your right forearm and your bicep should stay folded. This is what coaches refer to as "lag." You're holding on to that stored energy, waiting to release it at the last possible moment.

A great analogy is throwing a ball. You would never start the throw by immediately straightening your arm. Your elbow leads your hand, keeping the angle in your arm until right at the end, when your arm snaps forward to create speed. The same thing happens in the golf swing. By maintaining that bend in your right arm, you allow the speed to build up naturally and unload at the perfect time: right at the golf ball.

Releasing the Power: Impact and the Finish

Now it's time to cash in on all that good work. The release is an explosive but controlled uncoiling through the ball and into a balanced finish.

The Moment of Truth: Right Arm Action at Impact

As the club drops into the hitting area, your continuing body rotation will pull the arms through. It's at this point that the right arm finally starts to straighten and release its stored energy. The feeling is that the right palm is moving towards the target, delivering a powerful push through the back of the golf ball.

It's important to note that the right arm isn't fully straight at the exact moment of impact, it’s still very slightly bent. It achieves full extension just after the ball is struck. This prevents the right hand from taking over and "flipping" the clubhead, which adds loft and causes inconsistent contact. You don't hit at the ball, you swing through the ball, and your right arm straightens as a result of that motion toward the target.

Full Rotation and Extension

After impact, your momentum keeps going. Allow the right arm to fully extend down the target line, feeling as though you are "shaking hands with the target." As your body continues to rotate all the way a-round, your right arm will naturally fold again as it comes up and around your head to a balanced finish position. Your right shoulder, which was behind you at the top of the backswing, should now be facing the target. This full rotation is proof that you've used your whole body and released all your power into the shot.

Try This: The Right-Arm-Only Swing Drill

To feel how the right arm should work in harmony with your body, this simple drill is incredible. It strips away complexity and forces you to connect the arm to your turn.

• Take your normal setup with a mid-iron, like an 8-iron or 9-iron.
• Now, take your left arm off the club a-nd let it hang down naturally or place it across your chest.
• Grip the club with just your right hand.
• Make some very small, half-speed practice swings. Your only an intention is feeling the connection between your body's turn and your arm's motion.
• Feel how your torso turn starts the backswing, which then causes your right elbow to fold naturally.
• On the way down, focus first on using your lower body turn to bring the arm down. Then feel the right arm straighten through the impact area, not at where the ball would be.

The goal isn't to a-hit the ball far. The goal is to train your right arm to be a follower of your body's motion, not a leader.

Final Thoughts

Understanding the role of the right arm boils down to shifting its job from being a wild power generator to a structured power supporter. By focusing on maintaining connection, letting it fold and unfold in sequence with your body's rotation, and allowing it to passively drop into the slot, you’ll replace inconsistent, arm-driven swings with a powerful body-led motion.

If you're finding it difficult a- to feel these positions on your own, I invite you to see a personal AI swing coach for what a- i can do to help. I am a golf coach first a-nd for most and designed my a- i app Caddie AI to provide instant analysis of all elements of the swing and can illustrate exactly what your right arm is doing in the video you shot and uploaded. It helps to bring these correct movement to get rid of guess work and provides confidence instead a-s you head straight onto the course afterward!