Session
| Video | sample-range-session.mov |
|---|---|
| Duration | 21.0 s |
| Resolution | 1080×1920 |
| Frame rate | 30.00 fps |
| Swings detected | 3 |
| Handedness | right |
| Camera angle | Face-on |
| Club | Iron |
Metrics
| Swing | Strike (s)When this swing's ball strike happened, in seconds into your clip. It's how the report tells your swings apart — nothing to train here. Measured in seconds, straight from your video's frames. |
Backswing (s)How long the club took to go back, from the hands leaving address to the top of the swing. There's no single right number on its own — what matters is how it compares to the downswing, which is the tempo ratio. Measured in seconds, straight from your video's frames. |
Downswing (s)How long the club took to come down, from the top to impact. Tour players sit near 0.25 s, but the ratio to your backswing matters far more than the raw time. Measured in seconds, straight from your video's frames. |
Tempo (reference 3.0:1)Backswing time divided by downswing time. A low ratio usually means the club changed direction before the backswing finished, which turns contact into a timing gamble. 3.0:1 is the tour reference — moving toward it matters more than hitting it, and staying at or above 2.4:1 keeps it off the flag list. A ratio: backswing time ÷ downswing time. |
Head sway A→T (SW)How far your head drifts away from the target on the way back. Drift moves the bottom of your swing with it, so hitting the ball first then needs a perfectly timed slide home. The head can rotate freely — it just shouldn't travel more than about 0.35 SW. SW = shoulder-widths — so the number means the same however far the camera stands. |
Head sway T→I (SW)How the head moves from the top down to impact — negative means back toward the target. A small move toward the target coming down is normal and isn't flagged on its own; it's shown as context for the backswing number. SW = shoulder-widths — so the number means the same however far the camera stands. |
Hip slide A→T (SW)Sideways hip movement away from the target going back. A slide looks like a turn but loads nothing — the trail hip never coils, so the downswing starts with nothing to push from. Turning inside about 0.35 SW is the reference. SW = shoulder-widths — so the number means the same however far the camera stands. |
Hip slide T→I (SW)Hip movement from the top to impact — negative means toward the target, which is exactly how a downswing starts. Context, not a flag. SW = shoulder-widths — so the number means the same however far the camera stands. |
|---|---|---|---|---|---|---|---|---|
| 1 | 3.20 | 0.78 | 0.34 | 2.29 | 0.41 | -0.12 | 0.22 | -0.18 |
| 2 | 9.80 | 0.81 | 0.35 | 2.31 | 0.38 | -0.10 | 0.19 | -0.21 |
| 3 | 16.40 | 0.84 | 0.33 | 2.55 | 0.33 | -0.14 | 0.24 | -0.16 |
| mean ± std | — | 0.81 ± 0.02 | 0.34 ± 0.01 | 2.38 ± 0.12 | 0.37 ± 0.03 | -0.12 ± 0.02 | 0.22 ± 0.02 | -0.18 ± 0.02 |
Impact & finish
| Swing | Head dip A→I (SW)How much your head drops between address and impact. A small squat is normal; a big drop lowers the whole swing's low point, so clean contact needs a last-instant rescue. Staying under about 0.25 SW is the reference. SW = shoulder-widths — so the number means the same however far the camera stands. |
Lead arm at impact (°)How straight your lead arm is at the strike — 180° is perfectly straight as the camera sees it. A bent lead arm at impact shortens your reach at the exact moment that decides contact. Staying above about 150° is the reference. Degrees as the camera sees them, filmed face-on. 180° = a perfectly straight arm. |
Shoulder tilt at impact (°)How tilted your shoulder line is at the strike — positive means the trail shoulder is lower, which is what a good impact looks like. Level or reversed shoulders usually mean the body stalled and the hands flipped at the ball. At least about 5° of tilt is the reference. Degrees as the camera sees them, filmed face-on. Positive = trail shoulder lower. |
Tilt change A→I (°)How the shoulder tilt changed between address and impact. It should hold or grow — the trail shoulder working down through the ball — so a negative change (tilt shrinking) is the classic stand-up pattern. Degrees as the camera sees them, filmed face-on. Zero or positive change is the reference. |
Finish balance (SW)How much your feet moved while holding the finish. A quiet, held finish reads near zero and is the cheapest proof the whole swing stayed in balance; a step or stumble reads tenths. At or under about 0.15 SW is the reference. SW = shoulder-widths — so the number means the same however far the camera stands. |
|---|---|---|---|---|---|
| 1 | 0.08 | 168 | 13 | 4 | 0.06 |
| 2 | 0.11 | 171 | 12 | 4 | 0.04 |
| 3 | 0.09 | 166 | 14 | 4 | 0.07 |
| mean ± std | 0.09 ± 0.01 | 168 ± 2 | 13 ± 1 | 4 ± 0 | 0.06 ± 0.01 |
| reference | ≤ 0.25 | ≥ 150 | ≥ 5 | ≥ 0 | ≤ 0.15 |
Session notes
- Tempo is impressively consistent across swings (std dev 0.12). Consistency like this is a real asset — low variance is itself a finding worth keeping.
Swing 1
- Head sways 0.41 shoulder widths away from the target going back (flagged beyond 0.35). Feel like the head stays inside the trail foot at the top.
- Tempo ratio 2.3:1 is quicker than the 2.4 threshold (tour average is about 3.0:1 with a downswing near 0.25 s). Let the backswing finish before starting down.
Key positions
Centerline overlay
Swing 2
- Head sways 0.38 shoulder widths away from the target going back (flagged beyond 0.35). Feel like the head stays inside the trail foot at the top.
- Tempo ratio 2.3:1 is quicker than the 2.4 threshold (tour average is about 3.0:1 with a downswing near 0.25 s). Let the backswing finish before starting down.
Key positions
Centerline overlay
Swing 3
- No flags on this swing — tempo and lateral movement are inside the configured thresholds.
Key positions
Centerline overlay
What's working
- Hip slide stays at 0.24 shoulder widths or less in the backswing — inside the 0.35 line. The hips are turning, not drifting.
- Head dip tops out at 0.11 shoulder widths into impact — inside the 0.25 line. Height is holding through the strike.
- Lead arm stays at 166° or straighter at impact (180° is straight) — width through the ball is there.
- Shoulder tilt holds at 12° or more at impact — the trail shoulder is working down through the ball.
- Finish drift stays at 0.07 shoulder widths or less — the swing is ending somewhere the body can hold. Keep holding every finish.
- Tempo is consistent swing to swing (±0.12) — same clock every time. That's an asset worth protecting.
Start here
Fix one thing at a time. This week: Head sway (backswing)
Head sway (backswing)
majorsession mean: 0.37 SW (flagged above 0.35 SW)
Lateral head drift going back moves the swing's centre, and the downswing has a quarter of a second to find its way home. Keeping the head inside the trail foot makes the turn repeatable instead of a recovery.
Fix: Turn into the trail hip rather than drifting across it — the stick and mirror drills give the body a hard reference.
More to work on later (1)
Tempo
majorsession mean: 2.38:1 (reference 3.0:1 · flagged below 2.4:1)
A backswing that never finishes forces the downswing to start from a moving platform, and everything after that is timing. The 3:1 ratio is not magic — it is simply the range where the swing has time to change direction.
Fix: Rehearse one count until it is boring — metronome or out loud.
Practice plan
Head sway
Stick outside the trail foot
Turn behind the ball instead of drifting off it.
- Push an alignment stick into the ground just outside your trail foot, leaning slightly toward you.
- Make slow backswings — brushing the stick means the body is drifting, not turning.
- Feel pressure load into the inside of the trail foot at the top.
- Hit balls at 80% effort while staying clear of the stick.
Show the motion
Dosage: 3 x 10 swings, 3x/week
Pass mark — Re-film: head sway address-to-top at or below 0.35 shoulder widths on every swing.
Needs one alignment stick pushed into turf; at home, a doorframe or a chair back beside the trail hip works.
Mirror head box
Give the eyes proof of a quiet head before the ball does.
- Face a full-length mirror and take your address.
- Mark your head's reflected position with a piece of tape on the glass.
- Rehearse to the top: the head may rotate, but it stays inside the tape.
Show the motion
Dosage: 2 x 10 rehearsals, daily
Pass mark — Re-film: address-to-top head sway inside 0.35 shoulder widths on three consecutive sessions.
Built around a full-length swing mirror.
Tempo
Three-beat count
Give the backswing time to finish before the downswing starts.
- Set a swing metronome to a steady beat, or count out loud.
- Take the club away on one, reach the top on three.
- Start down on the next beat — never before it.
- Begin at half speed and build up while the count holds.
Show the motion
Dosage: 3 x 10 swings, 3x/week
Pass mark — Re-film five swings: tempo ratio at or above 2.4:1 on at least four of them, trending toward the 3.0:1 benchmark.
A clip-on swing metronome keeps the count honest; counting out loud works without one.
Late whoosh
Move the swing's speed to the bottom of the arc instead of the top.
- Swing a weighted tempo wand and listen for where the whoosh is.
- Make the loudest whoosh happen past the ball position, never at the top or early in the downswing.
- Alternate one wand swing and one normal swing with the same feel.
Show the motion
Dosage: 3 x 8 swings, 2x/week
Pass mark — Re-film: downswing near 0.25 s with a backswing long enough to keep every tempo ratio at or above 2.4:1.
Built for a weighted tempo wand; two irons held together give a similar feel.
Pause at the top
Separate going back from coming down so the transition stops rushing.
- Swing to the top and hold a full one-second pause.
- Start down from the dead stop at about 70% effort.
- Over ten swings, shrink the pause to a beat — not a stop.
Show the motion
Dosage: 2 x 10 swings, 3x/week
Pass mark — Re-film: no swing under 2.4:1, with the session mean moving toward 3.0:1.
Matched training aids — the gear these drills are built around.
- Phone at hip height, sound on.
- Film face-on (chest toward the camera) — that's the angle every number here is measured from. A down-the-line clip gets tempo & rhythm only for now.
- Whole body in frame, ball on a tee, and don't trim the clip.
Automated estimates from a single camera. Not a substitute for instruction from a teaching professional.