What Is Sway in the Golf Swing?
Sway is a fault in which the trail hip shifts laterally more than 4 inches in the backswing, moving outside the trail foot so the body loads linearly instead of rotationally. Without a rotary coil, the player must time a slide back to the ball, which rarely returns to the same spot twice. The result is fat and thin contact and pushes — a moving low point that destroys consistency.
How GOAT Detects Sway
You film one swing. GOAT's engine sequences it phase-by-phase and compares your backswing against elite technique, isolating the lateral slide instead of overwhelming you with every minor flaw.
| Measurement Input | Target Boundary | What It Reveals |
|---|---|---|
| Trail-hip lateral shift (camera) | < 4 in in backswing | Slide off the ball |
| Trail-hip vs. trail foot (camera) | Stays inside trail foot | Rotary load vs. linear drift |
These are the markers the camera reads from one swing. GOAT's two-sensor set then adds what no camera or computer vision can — the rotation behind the fault — covered next.
What the Sensors See That a Camera Can't
Sway is, at its root, a loading problem — the trail side slides instead of coiling, so there's nothing stored to unwind. GOAT's two-sensor set tracks what tightens up first as you fix it: how repeatable and how smooth your loading becomes, swing after swing — your number, your trend. That's today. The deeper layer GOAT is building reads whether your trail side loads by turning or by sliding directly, so you'll watch the coil replace the slide as you progress.
How to Correct Sway: The Wall-Glute Backswing Drill
What are the step-by-step instructions for the Wall-Glute Backswing Drill?
- Stand so your trail glute lightly touches a wall or an alignment stick set just outside your trail hip at address.
- Make slow backswings turning your trail glute into the reference rather than sliding past it, loading the trail hip with rotation.
- Unwind from that loaded position into the downswing, feeling the hips turn rather than drift, so weight transfers rotationally. Research on the load phase links rotary trail-hip loading to a stable low point (Titleist Performance Institute sway/slide literature).
Frequently Asked Questions
What causes sway in golf?
Often a mobility or stability limitation — limited trail-hip internal rotation or weak glute control — pushes the body to slide laterally instead of rotating into the trail hip. The technical fault and the physical limitation reinforce each other, which is why a swing thought alone rarely fixes it.
What is the difference between sway and slide?
Sway is excessive lateral movement away from the target in the backswing; slide is excessive lateral movement toward the target in the downswing. Both replace rotation with linear motion, but they happen at opposite ends of the swing and need different corrective feels.
Training the Fix with GOAT
GOAT builds a short custom course around this one bottleneck — the body limitation and the technical fault trained back-to-back — with a daily fast-feedback check so you can make sure you're moving in the right direction daily. Your phone gets you diagnosed and into the fix today; GOAT's two-sensor set is the next layer, measuring the loading behind the fault directly. Your GOAT coach narrates each step in plain language and confirms when the change is sticking.
Film one swing and find your biggest opportunity for rapid progress.
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