Turning One Swing Fault Into a Four-Week Practice Block

The report comes back and it lists eight things. Pelvis sway, early extension, a shallow hand path, lead wrist extension at the top, trail elbow stuck, head rising, thorax straightening, pelvis not open enough at impact. All eight are probably real. None of them is a plan. You cannot practise eight things in a 45 minute range session on a Tuesday night in February, and if you try, you will practise none of them.

An ai golf practice plan worth the name does the opposite of what the software does. The software expands. The plan contracts: one fault, four weeks, one exit test with a number on it that you either hit or you don’t.

First, work out what your tools can actually see

Before you pick a fault to chase, you need to know which parts of that eight-item list are measurement and which parts are decoration. This is where most club golfers get burned, because the confident tone of an AI report doesn’t change with the confidence of the underlying data.

Two practical points that change your numbers more than the subscription tier does. Frame rate: your downswing takes about a quarter of a second, so 30fps gives you roughly seven frames from top to impact and 240fps gives you sixty. Shoot 1080p at 240 and stop using the 0.5x ultra-wide lens, which bends the shaft plane before any software touches it.

Camera position matters just as much. Shift the phone ten degrees off true down-the-line and a 3D model will happily report a different pelvis depth for a swing you didn’t change. Lock it down: tape a cross on the mat, record the tripod height in centimetres and the distance in feet, write both on a card and keep the card in your bag. Capture your baseline twice on two different days and average it. If the two captures disagree by more than about 20%, your camera setup is the fault, not your hips.

The eight faults are usually one fault wearing hats

Here is a real-shaped report for a 14 handicapper, 7-iron, shot down-the-line and face-on at 240fps:

SWING REPORT  |  7-iron  |  benchmark band = 10-15 HCP male

1. Pelvis sway, backswing         4.1 in trail side      [band 1.5 - 3.0]
2. Pelvis thrust, downswing       3.8 in toward ball     [band 0.0 - 1.5]
3. Lead wrist extension at top    28 deg extended        [band 10 - 20]
4. Thorax bend at impact          14 deg                 [band 25 - 35]
5. Hand depth at P4               2.3 in shallow
6. Trail elbow at P5              low / behind torso
7. Head height gain P4 to P7      1.9 in up
8. Pelvis rotation at impact      28 deg open            [band 35 - 45]

Read it again and count how many separate events are described. Flags 2, 4, 6, 7 and most of 8 are the same movement: the hips push toward the ball in the downswing, the chest lifts to make room, the arms get trapped, the pelvis stops rotating. That is early extension, reported five times because the model measures five body segments and the movement touches all of them. Flag 1 is the setup for it. Flag 3, the wrist, and flag 5, hand depth, are genuinely separate and genuinely secondary.

So it isn’t eight faults. It’s one primary fault, one contributor and two independents. That reframing is the whole job, and no current tool does it for you.

Three filters for picking the one

Is it upstream? Fix a parent movement and the children move on their own. Fix a child and the parent drags it straight back. Early extension is a parent; trail elbow position is a child.

Does it cost you shots? Pull your Shot Scope or Arccos data before you commit. Our 14 handicapper was losing 2.1 strokes per round on approach shots from 130 to 160 yards, with a proximity average of 48 feet and 31% of those approaches short. Early extension produces exactly that pattern: low-face strikes, weak smash, distance that vanishes without warning. The data and the video agreed, so the choice made itself.

Can you measure it at home, every session, in under two minutes? If the answer is no, pick something else. Pelvis thrust from a fixed phone position passes. “Better sequencing” does not.

If you want the longer version of how to run analysis into structure, our pillar on turning analysis into a practice plan covers the framework across all fault types, not just this one.

The four-week block

Three sessions a week, 40 minutes each. Not more. The block is built so that every week adds one variable back in, which is how you stop a range fix from evaporating on the first tee.

Week 1: the movement, no ball, no speed. Alignment stick in the ground at 45 degrees, tip touching your backside at address. Twenty swings a session where your trail glute keeps contact into impact. No ball for the first two sessions. Third session: half-swings only (8 o’clock to 4 o’clock) at roughly 60% of full speed, which for an 80mph 7-iron means around 48mph on the R10. Film three swings at the end of each session. Baseline was 3.8 inches of thrust. Target by Friday: under 3.0.

Week 2: ball contact, speed at 75%. Same stick, now hitting 7-irons at around 60mph club speed. Spray the face with foot powder on ten of every thirty. You are looking for strike height climbing off the bottom grooves. Realistic mid-week numbers: smash factor moving from 1.28 to 1.32, carry from 141 to 147 yards, and the low ones stop appearing three in a row. End of week capture target: pelvis thrust under 2.2 inches.

Week 3: interference. This is where most people skip ahead and lose the block. Remove the stick. Randomise: 7-iron, 5-iron, pitching wedge, never the same club twice in a row, full speed, one ball per “shot” with a target and a pre-shot routine. Your numbers will get worse for two sessions. That’s the point. Random practice with variable clubs transfers to the course; forty identical 7-irons off a mat does not. Add one session on grass if your club has a turf bay or a quiet corner of the practice ground. Mats let a skidding club hide a low-point problem entirely.

Week 4: pressure and transfer. Two range sessions where every shot has a consequence you’ve written down beforehand (miss the 15-yard-wide corridor at 150 yards, start the set again), and one nine-hole round played as practice. Then the test.

The exit test, with actual numbers

Run it at the end of week four, one session, 30 balls, 7-iron, launch monitor on, phone on the tripod at the recorded height and distance. Three gates. All three must pass.

GATE A  Strike     smash factor >= 1.32 on 22 of 30 shots
                   (baseline: 11 of 30)

GATE B  Dispersion carry distance std dev <= 8 yards over 30
                   (baseline: 14.2 yards)

GATE C  Mechanics  pelvis thrust < 1.5 in on all 3 filmed swings,
                   swings chosen at random from the 30, not cherry-picked

Gate C is the one people cheat. Have the app capture swings 7, 18 and 26 regardless of how they felt, and take the numbers as they land. A block that passes A and B but fails C has bought you a compensation, and compensations expire.

Then there’s the on-course gate, run within two weeks: nine holes with Shot Scope tracking, and approach proximity from 130 to 160 yards inside 40 feet, down from 48. That’s a small, boring-looking number. It is also worth about a stroke and a half a round.

Fail one gate and you repeat weeks 3 and 4 only. Fail two and you go back to week 2. Do not restart from week 1 unless the video shows the movement fully back to baseline.

The failure mode nobody warns you about

Resist re-running the full AI scan during the block. Every capture will hand you a fresh set of eight flags, some of them new, some of them noise from a phone that was six inches off, and every one of them is an invitation to abandon a plan that hasn’t had time to work. Measure the single metric you chose. Ignore the rest until week four is done.

The other trap is treating the benchmark bands as targets. That 35-to-45 degree pelvis rotation figure is drawn from a population, not from you, and chasing a population average with a body that had a hip replacement in 2019 is a way to get hurt. Your baseline is the benchmark that matters.

Pick the fault this weekend. Write the three gate numbers on the same card as your camera measurements, before you start, because a test you design after seeing the results isn’t a test.