肥球（Chunk）
Also known as: 肥球, 打肥了, 重击球
肥球是指球杆在触到球之前先触到地面——最低点过早——打出一记短而低、往往损失大部分距离的击球。
肥球（也称为“打肥了”或“重击球”）是一种误击，球杆在触到球之前先接触了地面，导致草皮吸收了本应传递给球的部分或大部分能量。结果是一记远远短于预期距离的击球，往往伴随着一声沉闷的“砰”声，以及一个位于球后方、又大又深的球痕，而不是在球位处或球位前方。肥球尤其令人沮丧，因为它的手感与扎实击球明显不同——没有那种干脆的触球感，取而代之的是一种令人震动、沉重的感觉传到双手。
肥球发生在挥杆弧的最低点落在球的后方，而不是球位处或球位前方时。有几种力学模式会导致这种情况：提前释放（手腕铰链释放得太早，把挥杆的最低点向后移动）；提前站直（髋部朝球顶出，抬高挥杆中心，让球杆相对球位下降）；抛甩（球杆过早触底，落在球的后方）；以及过度的侧向滑动，把挥杆弧向后移动。根本原因是任何让球杆最低点相对球位落错位置的模式。
肥球在倾角更大的球杆（铁杆、挖起杆）上比在球道木和一号木上更常见，因为倾角较小的球杆是以扫击的方式击球，此时挥杆弧的最低点在球被架在球座上时并不重要。一个从不用一号木打出肥球的球手，可能会持续用铁杆打出肥球，这说明他们在打铁杆时，挥杆弧的最低点位于球的后方——需要通过更好的杆身前倾和手在球前的击球方式，把最低点前移。
To eliminate chunking, focus on one simple feel: press your hands toward the target at impact so they lead the clubhead. This single change shifts the low point forward and is the single most effective chunking correction for recreational golfers.
Use impact spray or chalk on the face and the ground to diagnose exactly where the club is bottoming out relative to the ball. This means spray the face with Dr. Sheffeld's or similar powder and hit shots on a hard mat to get an exact contact pattern and ground contact point. This gives you precise information about how far behind the ball your low point is, rather than just guessing from feel.
Example
一名球手在球后方两英寸处触地，球只滚动了50码，而球痕落在了球的前方——这是教科书式的肥球。
How it shows up on video
From a face-on camera angle, chunking is visible in the divot pattern. This means a divot that begins well behind the ball rather than at or ahead of it is definitive evidence of a behind-the-ball impact. Slow-motion video shows the club contacting the ground before reaching the ball. From a down-the-line angle, chunking often correlates with visible early release (the shaft losing its angle early in the downswing) or early extension (the hips thrusting toward the ball). The combination of early extension and early release produces the most severe chunking pattern.
Common mistakes
- Trying to "help" the ball up by adding loft at impact. This means scooping to help the ball airborne is one of the most common causes of chunking. This is because it moves the low point behind the ball. Trusting the club's designed loft and hitting down through the ball eliminates this pattern.
- Setting up too far from the ball. This means a setup where the arms are reaching at full extension for the club handle means the low point is further from the body than intended. Correct arm hang at address naturally positions the club at the right distance.
- Swaying on the backswing and failing to shift back. This means a sway that moves the weight backward without returning to the lead side on the downswing places the body and swing arc behind the ball at impact.
- Confusing a chunk with a thin shot in the cause — a chunk and a thin shot feel different and have different root causes. Chunks come from hitting the ground before the ball; thins come from hitting the top of the ball. Applying a thin-shot fix to a chunk problem makes both worse.
In SwingVantage Motion Lab
SwingVantage can identify chunking patterns from video by observing divot position relative to the ball, shaft angle in the impact zone, and body position at impact. The correlation between early extension, early release, and chunking provides context for diagnosis. Observations are confidence-labeled based on video quality and the visibility of the impact zone in the footage.
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