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Golf Swing Impact Position: What AI Detects About Your Strike in 30fps

Impact position is G5 + G6 executing in sequence. GOATY's server-side pose detection scores both gates on every rep and identifies whether your impact breaks down at clearance or extension.

Updated April 2026  |  1,896 members  |  36 countries

Nobody can feel their own impact position in real time. The downswing from transition to impact takes approximately 250 milliseconds — far below the threshold of conscious proprioceptive feedback. You feel after the shot whether it was good or bad. You cannot feel during the swing whether G5 cleared or G6 held.

This is why impact position is one of the most persistently broken aspects of amateur golf. Instructors demonstrate ideal impact on video. Students understand what it should look like. But without per-rep detection of whether your body achieved it, you are practicing on feel alone — which means you are practicing the same pattern you already have, regardless of whether it's correct.

GOATY's 30fps server-side pose detection captures the impact zone and evaluates G5 and G6 state on every rep. You get live feedback about what your impact position is actually doing — not what you think it's doing.

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GOATY scores G5 + G6 on every rep and delivers a correction when either gate fails. Free. No download. Works on your phone, at home, right now.

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What Makes a Good Impact Position

Elite impact position has four observable characteristics: hands ahead of the ball (shaft lean forward), lead arm extended and connected, weight forward on the lead side, and lead hip cleared and open. In GOATY's gate framework, these characteristics map to G5 and G6 executing in sequence.

G5 — Clearance Gate

Lead Hip Clearance Timing

The lead hip must rotate open before impact arrives. This creates the physical space the arms need to deliver the club on the correct path. Without G5 clearing, the arms are blocked, hands flip, and contact is inconsistent. G5 failure produces the crowded, flippy impact that prevents shaft lean.

G6 — Extension Gate

Body Extension / Forward Post

The body must maintain its forward-lean position through the strike — not rise, thrust, or extend early. G6 failure (early extension) raises the arc low point and produces thin contact. The body "stands up" to create room the arms should be providing through proper G5 clearance.

The sequence matters: G5 clears, creating space → G6 holds the position, maintaining arc depth → impact occurs with hands ahead and the correct shaft lean. If the sequence is reversed or either gate fails, impact position degrades.

How GOATY Evaluates Impact

GOATY's server-side pose detection system processes your video at 30 frames per second via MediaPipe FULL model running on dedicated CPU infrastructure. At 30fps, the impact zone is captured across 2-3 frames with sufficient resolution to evaluate G5 and G6 state.

For G5 evaluation: GOATY measures lead hip rotation angle at the frame closest to impact. If the lead hip has not rotated past the G5 threshold (calibrated from the GOAT Model), G5 fails. The failure is logged, and a lead hip clearance cue is queued for delivery before the next rep.

For G6 evaluation: GOATY measures the distance between the lower sternum and the ground relative to the address position. If the body has risen significantly (early extension pattern), G6 fails. The failure points GOATY toward either the G5 root cause (blocked hip causing the rise) or the G3 root cause (insufficient coil, body thrusts instead of rotates).

The 3 Impact Position Failures and Their Gate Signatures

FAT CONTACT
Gate signature: G3 fail + G4 pass — Arc low point is behind the ball. Trail hip coil was insufficient (G3 fail), leaving the body in a reverse-weight position. The downswing fails to shift pressure forward and the club bottoms out behind the ball. Less common than thin, but produces the most distance loss per occurrence.
THIN CONTACT
Gate signature: G6 fail — Arc low point is above the equator of the ball. The body rises through impact (G6 fail / early extension), lifting the arc. The cause is often G5 not clearing (arms cramped → body rises to create room) or G3 insufficient coil (nothing to post against → body extends instead of rotates).
FLIP / SCOOP
Gate signature: G5 fail — Lead hip hasn't cleared, arms are blocked, wrists flip to square the face. Produces high, soft shots with no shaft lean. The most common impact fault in golfers shooting 90-100. Also produces inconsistent fat/thin patterns because the arc low point is determined by the timing of the flip, which varies rep to rep.

GOATY's Impact Coaching Path

When G5 or G6 fails, GOATY's coaching hierarchy works upstream through the gate system:

  1. G5 fail detected → Lead hip clearance cue: "Drive the lead hip through and back." If G5 failures persist, GOATY checks G3 — insufficient coil is the most common upstream cause of G5 clearance failure.
  2. G6 fail detected (early extension) → GOATY checks whether G5 also failed. If yes: G5 is the cause (body rising to create room for blocked arms) — fix G5 first. If G5 passes: G3 is the likely cause (no coil energy → body thrusts) — trail hip coil cue delivered.
  3. Both G5 + G6 fail → Combined clearance-and-extension pattern — typically a G3 root cause creating a cascade. Trail hip coil cue addresses the root, and G5/G6 improvements follow within the same session in the majority of cases.

The GOAT Model achieves G5 pass rate of 97%+ and G6 pass rate of 96%+ across verified reps — confirming that elite impact position is defined by nearly perfect execution of both gates in sequence. GOATY's data from 1,896 members shows that improving G5 pass rate from below 60% to above 75% produces a measurable improvement in ANCHOR subscores (impact quality metrics) within 2-3 sessions.

Find Out Whether G5 or G6 Is Breaking Down Your Impact

GOATY evaluates both gates live on every rep and tells you which one is failing and why. Free. No credit card required.

Start Free Lesson → Also read: Golf Swing Sequence — When the Kinematic Chain Breaks Down

Why Nobody Can Feel Their Impact Position

The physics of the downswing make impact feel-based training unreliable. The clubhead is traveling at 80-120mph at impact. The contact time between club and ball is roughly 0.5 milliseconds. Your proprioceptive system has a reaction time of approximately 150-200 milliseconds — roughly 300-400 contact events would occur in the time it takes your nervous system to process a single sensory signal from the impact zone.

What you "feel" at impact is entirely a retrospective construction — your brain compositing multiple sensory signals after the fact into a plausible story about what happened. The story is often wrong. Golfers who describe "feeling" a flush strike frequently show G6 failures when reviewed in video. Golfers who describe "feeling" thin contact sometimes show clean G5 and G6 execution and the thinness came from a grip or setup issue.

GOATY doesn't rely on feel. It detects. G5 and G6 are evaluated from body position data — objective, per-rep, accumulated over a full session. The pattern that emerges from 20-30 reps of gate data is more accurate than any feel-based diagnosis you could construct.

Frequently Asked Questions

What creates a good golf impact position?

A good golf impact position requires G5 (lead hip clearance) completing before impact and G6 (body extension) holding through impact. G5 creates the space the arms need to deliver the club. G6 maintains the posted forward position through the strike. Both must execute in sequence: G5 clears, then G6 holds. Without both gates passing, impact is inconsistent.

What causes early extension in the golf swing?

Early extension is a G6 failure — the body rises or thrusts toward the ball through impact. The most common causes are insufficient G5 clearance (the lead hip hasn't moved out of the way, so the body rises to create room) or insufficient G3 coil (the hips have no stored energy to drive rotation, so the body thrusts instead). GOATY detects G6 failure and traces whether the root cause is G5 or G3.

Can GOATY detect thin and fat contact from body position?

GOATY identifies the body position patterns that correlate with thin and fat contact. G6 failure (early extension) correlates with thin contact because the arc low point rises. G3 failure followed by late downswing shift correlates with fat contact because the low point moves behind the ball. GOATY delivers the relevant coaching cue when these patterns are detected.

How does GOATY's 30fps detection capture impact position?

GOATY's server-side pose detection runs at 30 frames per second via MediaPipe FULL model on dedicated CPU infrastructure. At 30fps, the impact zone is captured with sufficient temporal resolution to evaluate G5 and G6 state at the relevant moments. The system captures the frame closest to impact and evaluates whether G5 has cleared and G6 is holding.

Stop Guessing About Your Impact Position

GOATY detects G5 and G6 on every rep and delivers live coaching when either fails. Free lesson. No credit card. Works on your phone right now.

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CQ

Chuck Quinton

Founder & Lead Golf Biomechanics Researcher

Chuck has spent 30+ years researching golf biomechanics and has analyzed over 150,000 swings. He built GOATY — an AI golf coach that watches your body in real time and speaks to you while you swing — based on data from over 450,000 RotarySwing members.