下蹲加载（Squat）
Also known as: 压力下沉, 坐姿动作
下蹲加载是指在下杆开始时，身体轻微向下沉降的动作，此时球手先向地面加载，随后在触球时向上爆发。
高尔夫挥杆中的下蹲加载，是指在上杆与下杆之间的转换过程中，身体重心出现的短暂下沉。顶级击球者的典型特征是，在启动方向变化时，身体不会保持恒定高度或立即在下杆中升起，而是会略微下沉——有时仅有一到两英寸。这种下蹲代表着身体在朝地面“加载”，为随后强劲的垂直推力做准备，这股推力将加速髋部乃至整条动力链。
下蹲的力学机制与地面反作用力的产生密切相关。当下半身准备蹬地时，膝盖会略微弯曲，髋部随之下沉。这一动作在腿部肌肉（特别是股四头肌和臀肌）中储存弹性能量，并增加了随后垂直推力的可用活动范围。从下蹲位置向上蹬起产生的反作用力，会通过髋部传导为旋转速度——这与深蹲跳跃比原地起跳更有力的原理是一样的。在测力板分析中，长打型球员几乎无一例外地表现出这种模式：后腿一个向下的加载阶段，紧接着一次巨大的向上推力。
这个下蹲动作应该小而自然——刻意夸大往往会造成一个凹陷，随后在下杆中又需要额外的代偿。下蹲过度的球手常常难以“打开”，容易在球的后方触球。许多教练把理想的下蹲描述为一种应该被感受到、而不是被刻意执行的动作。鼓励在转换阶段做一个小幅“顶动加下沉”的训练——前侧髋部朝目标方向移动的同时略微降低重心——能帮助球手在不过度思考的情况下找到这种模式。
To feel the squat, try a "bump and drop" drill. This means at the top of your backswing, move your lead hip slightly toward the target AND slightly downward before rotating. This means this initiates the ground-loading pattern that triggers the squat.
Film your swing from face-on and draw a horizontal reference line at your address hip height. In your downswing transition, your hips should briefly drop below that line before rising through impact. This means if you never drop below the line, you are missing the squat loading phase that elite players use to engage ground force.
Example — 测力板加三维动作捕捉
一名巡回赛球员的髋部在下杆开始时短暂下沉几英寸，随后向上、穿过球推起。
How it shows up on video
From a face-on camera angle, the squat is visible as a small but perceptible lowering of the overall body height at the very beginning of the downswing, before the body rises through impact. Watch the top of the golfer's head or the belt buckle level. This means elite players show a slight drop in the transition that then rises smoothly through and past impact. From a down-the-line angle, the squat shows as a slight deepening of the knee flex and hip descent at the start of the downswing rather than the body immediately rising from its backswing height.
Common mistakes
- Over-squatting or dipping. This means exaggerating the squat creates a low point problem where the club bottoms out too far behind the ball. This produces fat or chunked shots. The squat should be subtle, not dramatic.
- Confusing the squat with a sway — the squat is a vertical drop of the center of mass, not a lateral slide. A sway moves the hips sideways; a squat loads them downward. Many golfers who try to squat end up swaying instead.
- Rising too early (early extension) — the opposite of squatting. A golfer who stands up through impact loses all the stored energy of the loading phase and typically jams the club into the ball with no room to release.
- Trying to consciously time the squat during a full-speed swing — the squat happens reflexively in response to lower-body-led sequencing. Chasing the feeling during a swing produces tension; instead, train it through step drills and transition timing practice.
In SwingVantage Motion Lab
SwingVantage tracks vertical hip height changes from face-on video using pose estimation to identify the squat pattern in the transition. Because the squat involves small vertical movements. This means sometimes just 1–2 inches. This means the system notes that confidence in detecting this pattern depends by a lot on video resolution and the clarity of the golfer's hip landmarks throughout the swing.
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