Golf Tutorials

What Does Thin Mean in Golf?

By Spencer Lanoue
July 24, 2025

Hearing that clack... feeling that sting race up your arms... watching your golf ball scream across the ground at a hundred miles an hour. If that sounds familiar, you've experienced the frustration of a thinned golf shot. It’s a shot that leaves you feeling powerless and confused, but it’s one of the most common misses for golfers of all levels. This article will break down exactly what a thinned shot is, show you the simple, fundamental reasons why it happens, and give you practical drills you can take to the range today to start hitting pure, flighted iron shots.

What is a Thinned Golf Shot, Really?

Before we can fix the problem, we need to understand it. In simple terms, a thinned or "thin" shot happens when the leading edge of your golf club makes contact with the golf ball at or above its equator. Think of it as hitting the top half of the ball. Instead of compressing the ball down against the clubface and into the turf, the club essentially clips it, sending a low-flying liner that travels much farther than you had planned.

The ideal contact, especially with an iron, is what we call "ball-first contact." The clubhead travels on a slightly downward path into the ball, compresses it, and then continues downward to take a small divot of grass just after the ball's position. This "ball-then-turf" sequence is what creates that satisfying 'thump' sound, launches the ball into the air with backspin, and gives you control over your distance.

A thin shot is the exact opposite. The low point of your golf swing happens before the ball, causing the club to rise as it reaches impact. This ascending blow catches the ball thin and produces some very specific, and unwanted, results:

  • A very low ball flight: The ball never gets a chance to climb. It will skim the grass, sometimes not getting more than a few feet off the ground.
  • Excessive distance: With almost no backspin to control it, the ball will run out for a long, long way. This is why a thinned 9-iron can sometimes travel the distance of a 6-iron, often leading you into trouble behind the green.
  • A harsh feeling and sound: Forget that sweet, solid strike. A thinned shot feels like you hit a rock. It creates a loud "click" or "clack" and sends a jarring vibration right up the shaft into your hands and arms.

Understanding this distinction is the first step. You're not looking to lift the ball in the air, you're looking to hit down on it so that the club's built-in loft can do the work for you.

The Common Causes of Hitting it Thin

Now that we know what a thin shot is, let's look at the main culprits. The good news is that this isn't some complex mystery. More often than not, thinning the ball comes down to one of a few simple, correctable breakdowns in your swing. Your job is to become a detective and figure out which one is affecting you.

Cause #1: Lifting Your Body (Losing Your Posture)

This is, without a doubt, the number one cause of the thins. It’s instinctual. You want the ball to go up, so your body tries to help it up by lifting. At the critical moment just before impact, your chest comes up, your head lifts, and your spine angle changes. Think about your setup posture - that athletic tilt over the ball you worked to create. When you lift up during the swing, you lose that angle.

What happens when your chest and head rise? The center of your swing - your sternum - rises with them. As your entire swing arc lifts a few inches higher off the ground, theclub bottoms out in thin air instead of at turf level, making clean contact impossible. The club catches the ball on the way up, right on the equator.

How to check for it: Have a friend film your swing from down the line (facing your target). Freeze the video at address and draw a line across the top of your head. Now, play the video to impact. Is your head well above that line? If so, you're an early extender. You are coming out of your posture and lifting your body.

Cause #2: Hanging Back on Your Trail Foot

A powerful golf swing is a sequence of motion that moves toward the target. You rotate back, and then you unwind and transfer your weight forward onto your lead foot through impact. A very common fault is the "reverse pivot," or simply leaving your weight on your back foot as you swing down.

When your weight stays back, the low point of your swing moves with it. The club will bottom out behind the golf ball. From that position, the only way to make contact is for the club to travel upward as it gets to the ball - a recipe for a thinned, or sometimes even a topped, shot.

Your goal should be to finish your swing with nearly all of your weight on your front foot, stable and balanced, with your chest facing the target. Your back heel should be off the ground, with only the toe touching for balance.

How to check for it: After you hit a shot, hold your finish position for a few seconds. Do you feel balanced and stable on your front foot? Or do you feel wobbly and off-balance, maybe even taking a step backward to catch yourself? If you’re falling back, your weight isn’t moving forward correctly.

cause #3: A Disconnected, "All-Arms" Swing

The golf swing is a rotational action powered by your body - your hips and torso are the engine. Many amateur golfers fall into the trap of using only their arms and hands to swing the club up and down, almost like they're chopping wood.

This creates a number of problems. First, you lose a massive amount of power. But more importantly for our topic, an arms-only swing is incredibly hard to time. Your body is what provides stability and consistency to the swing arc. Without the body rotating properly, the arms are free to lift, drop, or pull in, constantly changing the low point of your swing. It’s a very unreliable way to deliver the club back to the ball.

How to check for it: Does your swing feel fluid and connected, with your arms and body turning together? Or does it feel like your arms are racing ahead or getting stuck behind a body that isn't turning? A coordinated swing feels like the club is simply along for the ride as the body rotates.

Actionable Drills to Eliminate Thin Shots

Theory is great, but getting better requires action. These simple drills are designed to give you the feeling of a correct swing. They provide instant feedback, so you'll know right away if you're doing them correctly.

Drill 1: The Towel Drill for a Downward Strike

This is a classic for a reason - it works. It directly tackles the root issue of hitting up on the ball.

  1. Take a small hand towel and fold or roll it up.
  2. Place it on the ground about 6-8 inches directly behind your golf ball.
  3. Set up to your ball as you normally would.

Your one and only goal is to hit the golf ball without hitting the towel. If you hang back on your trail foot or try to scoop the ball, your swing arc will bottom out early and you will hit the towel before the ball. To succeed, you have to shift your weight forward and deliver the club on a downward angle of attack, guaranteeing that crucial ball-first contact.

Drill 2: The Step-Through Drill for Weight Transfer

If hanging back is your an issue, this drill will force you to get your weight moving forward aggressively.

  1. Set up to your ball normally, but feel a little more athletic in your stance.
  2. Take your regular backswing.
  3. As you swing down and through impact, let your back foot (right foot for a right-handed player) naturally come off the ground and step forward, past your front foot, towards the target.

You can't do this drill correctly without transferring your mass and momentum through the ball. It’s impossible to step toward the target if your weight is stuck on your back foot. It promotes a full body rotation and ensures your low point moves forward, right where it needs to be for a pure strike.

Drill 3: The Headcover Drill for Maintaining Posture

This is a fantastic feedback tool to stop you from standing up and out of the shot.

  1. Take a driver or wood headcover and place it on the ground just outside of your golf ball (away from your body).
  2. Set up to the ball. The headcover should be in your peripheral vision, but not so close that you might hit it.
  3. Make some swings with one thought: keep your eyes focused on the ball through impact.

When you lift your head and chest prematurely, your eyes can't help but come up with them, and you'll lose sight of the ball and headcover. Forcing yourself to keep looking down - to see the club make contact with the ball - helps keep your spine angle constant. It builds the feeling of staying "in the shot" rather than bailing out early.

Final Thoughts

Dealing with thin shots is a common hurdle, but it's not a permanent condition. By understanding that a thinned shot is caused by the club hitting the ball on an upswing, you can start to diagnose your own faults, whether it's lifting your body, hanging back, or simply swinging with just your arms. These issues can be corrected with focused practice using simple, effective drills that train the proper feelings of a downward strike.

Sometimes, figuring out the specific "why" behind your swing fault can be the hardest part, especially when you're out on the course and under pressure. For those moments when you feel lost, new tools can make all the difference. With an AI coach like Caddie AI, you have an expert in your pocket. Imagine thinning approach and not knowing what to do. You can grab your phone, describe your shot, or even snap a photo of a tricky lie to get instant, personalized advice on how to handle the situation - all without judgment. We can help you identify a probable cause right there on the spot, turning a moment of frustration into a valuable learning opportunity.

Spencer has been playing golf since he was a kid and has spent a lifetime chasing improvement. With over a decade of experience building successful tech products, he combined his love for golf and startups to create Caddie AI - the world's best AI golf app. Giving everyone an expert level coach in your pocket, available 24/7. His mission is simple: make world-class golf advice accessible to everyone, anytime.

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