Stop Trail Leg Buckling for Better Impact

If your trail leg keeps collapsing or “buckling” through the downswing, you can lose the space your body needs to deliver the club consistently. That pattern often goes hand in hand with early extension, where your pelvis moves toward the golf ball instead of staying back and rotating. The result is usually inconsistent low point, unstable contact, and a release that relies too much on the hands and arms. This drill trains you to do the opposite: straighten the trail leg at the right time, keep your pelvis more stable, and move your body away from the ball as you turn through impact.

How the Drill Works

The idea behind this drill is simple: once the club gets about halfway down, your trail leg should begin to extend rather than continue folding inward. Many golfers let that leg keep bending during the release, which pushes the hips toward the ball and narrows the space between your body and the club. When that happens, you often stand up, throw the arms, and struggle to control where the club bottoms out.

By putting an object just outside or slightly behind your trail leg, you give yourself feedback. From the start of the release into the follow-through, you want to feel your leg moving away from the object or pressing into it in a way that encourages extension and rotation rather than collapse. That creates several helpful pieces at once:

• More space for the arms and club to swing through
• Better pelvis stability through impact
• Less early extension as the hips work back instead of toward the ball
• Improved height and posture through the strike
• More reliable low point and cleaner contact

The key timing is important. You are not trying to lock the trail leg from the start of the downswing. Instead, the useful feel usually begins when the club is around belly-button height on the way down and continues until the club is well into the follow-through. In other words, the trail leg is straightening as your body keeps turning through the ball.

If you have access to a resistance band and someone to hold it, that can work well. But for most golfers, a wall, corner, or firm object is the easiest way to create the same feedback. Because the obstacle can interfere with a full backswing, this is usually best used as a release drill rather than a full-swing drill.

Step-by-Step

1. Set up with a barrier near your trail leg. Use a wall, the corner of a structure, or a stable object that can give you feedback without moving. Position it so your trail leg can sense it during the downswing and release. You want enough proximity to feel resistance or awareness, but not so much that you cannot move naturally.

2. Take your normal address. Set up to the ball with your usual posture. Keep your balance centered and avoid starting too close to the object. If you are cramped at address, you will tend to make compensations before the drill even begins.

3. Make a shortened backswing. Bring the club back only to about waist-high or slightly higher. This is not a full-swing drill at first. A shorter motion makes it easier to train the release without the barrier interfering with your backswing mechanics.

4. Start down and wait until the club is halfway down. As the club transitions into the release, do not let the trail knee keep diving inward. This is the point where you want the trail leg to begin straightening.

5. Feel the trail leg extend as your hips turn. Your body should be rotating through the shot while the trail leg lengthens. Think of the back of that leg extending and the trail glute squeezing. This is not a jump straight up; it is an extending and turning motion.

6. Move pressure away from the golf ball. As the trail leg extends, your pelvis should feel more stable and slightly farther from the ball, not closer to it. This is the anti-early-extension piece. Your hips are working more into a back-angle rotation rather than thrusting toward the ball.

7. Swing through to a balanced follow-through. Continue turning until you reach a full finish. The trail leg should feel longer, the trail glute engaged, and your torso more “tall” through the strike. Let the extension continue into the follow-through rather than snapping back into flex.

8. Start with rehearsals, then add soft shots. Make several slow-motion reps without a ball first. Once the movement feels clear, begin hitting short shots at reduced speed. Contact may not be perfect immediately, and that is fine. The goal is to train a better body pattern first.

9. Gradually build length and speed. As you improve, you can move from short punch shots to three-quarter swings. Keep the same checkpoint: from halfway down through the release, the trail leg is extending while your body continues to rotate.

What You Should Feel

This drill tends to create a few very specific sensations. If you are doing it correctly, the movement will usually feel different from your normal swing—especially if you are used to driving the trail knee down and in through impact.

Trail leg extension through the release

The biggest feel is that your trail leg is getting longer from about waist-high in the downswing into the follow-through. It should not feel like the knee keeps collapsing toward the lead leg. Instead, the back of the leg extends as the club moves through impact.

Trail glute engagement

You should feel a strong squeeze in the trail glute. That is one of the best signs that the leg is extending in a useful way and that your pelvis is supporting rotation instead of sliding toward the ball.

More room through impact

Many golfers notice that they feel a little taller and slightly farther from the ball through the strike. That is often a positive sign. You are creating space instead of crowding the club.

Hips turning back, not driving forward

Your hips should feel like they are rotating into a more diagonal or “back” direction rather than chasing the ball line. If you usually early extend, this can feel almost exaggerated at first.

Less arm throw

When the lower body works better, the arms do not need to rescue the strike as much. The release should feel less like a last-second throw of the clubhead and more like the club is being delivered by the pivot.

Balanced finish

At the end of the swing, you should be in a stable follow-through with your body fully turned. If you finish off-balance or feel jammed, there is a good chance the trail leg collapsed instead of extending.

Common Mistakes to Avoid

• Trying to straighten the trail leg too early. If you force extension from the top of the swing, you can disrupt your sequence. The feel is usually best from halfway down through the release.
• Locking the knee rigidly. You want extension, not stiffness. The motion should be athletic and dynamic, not forced.
• Pushing upward without turning. If you only stand up, you will not fix the real issue. The trail leg must extend as your body rotates.
• Letting the pelvis move toward the ball. If your hips still thrust in, the drill is missing its purpose. Feel the pelvis staying back and creating room.
• Using too long of a backswing at first. This drill is usually easier to learn with shorter swings. Full swings too soon often hide the movement you are trying to train.
• Judging the drill only by contact early on. You may hit some poor shots while learning. That does not mean the drill is wrong. Focus first on the body motion.
• Standing too close to the barrier. If the object crowds you excessively, you will make unnatural compensations. Set it close enough for feedback, not so close that it traps you.
• Driving the trail knee down and inward. This is the exact pattern the drill is trying to remove. If you still see the knee buckle under, slow down and exaggerate the extension feel.

How This Fits Your Swing

This drill is not just about making your trail leg look better. It connects directly to two bigger swing issues: low-point control and early extension.

When your trail leg keeps bending through the release, your pelvis tends to lose stability. That often changes your height, pulls your hips toward the ball, and forces your arms to take over. Once the arms and hands become the main source of speed and delivery, contact gets less predictable. You may hit behind the ball, catch it thin, or see direction vary because the club is being thrown rather than supported by the pivot.

When the trail leg extends correctly, your body can keep turning through the strike while maintaining space. That helps you control where the club reaches the ground. In other words, it supports a more reliable low point. You are less likely to bottom out early or make last-second compensations just to find the ball.

This pattern also fits golfers who tend to stall the body and flip the club. A buckling trail leg often goes with a release where the lower body stops and the arms fire past. By training the trail leg to extend and the hips to keep rotating, you give the club a better environment to release naturally.

It is also useful if you have been told you early extend but have never felt what the correction should be. “Stay in posture” is often too vague. This drill gives you a more actionable motion: from halfway down, extend the trail leg, squeeze the trail glute, and keep turning. That feel can be much easier to apply than trying to freeze your hips in place.

As you work it into your swing, think of it as a release trainer. You are teaching your body how to move from the delivery position into a better impact and follow-through. Once that becomes more natural, you can blend it into fuller swings without needing the wall or object every time.

If your trail leg tends to collapse, this is one of the cleaner ways to organize the lower body. It helps you create space, improve pelvis control, and deliver the club with less compensation. And when those pieces improve, solid contact usually gets a lot easier.