Example analysis

Golf swing analysis: a worked example

A drive filmed from behind, down the target line, on a phone at 24 fps: four and a half seconds and 108 frames. The golf view found the swing's moments from the skeleton and read the posture, tempo and hands from one camera.

The clip

A golfer at address with a driver, filmed from behind down the target line, with the tracked skeleton and joint angles drawn over the video. — Skeleton and joint angles at address

The same golfer at impact, with the hands' path traced — blue on the way back, amber on the way down — and dashed lines where the hips and spine were at address. — The hands' path, and the address lines, at impact

Figure	What it is
1.7 : 1	Tempo, 0.50 s back and 0.29 s down
7.5 cm	Hips toward the ball by impact
24°	Trail knee straightens by the top
108	Frames, every one measured

At 24 fps impact falls between two frames, so the report gives the tempo with its margin (±0.4) rather than a falsely exact number.

The swing's moments

Point	Time
Address	0:01.50
First move	0:01.54
Takeaway	0:01.67
Top	0:02.04
Impact	0:02.34
Finish	0:03.04

Found from the skeleton, not tagged by hand. The golfer was detected as right-handed.

Tempo

The backswing took 0.50 s from first move to the top and the downswing 0.29 s from the top to impact: a tempo of 1.7 : 1, against the app's guide of 2.5–3.5. At 24 fps impact falls between two frames, so the report gives the tempo with its margin, ±0.4, rather than a falsely exact number, and suggests filming at 60 fps or more to tighten the timings. Golf swing tempo explains the ratio.

Posture

Reading	Value	Guide
Spine bend at address, forward of vertical	22°	—
Trail knee at address (180° straight)	145°	—
Posture held: spine at impact vs address (− = standing up)	−5°	−5° to 5°	in guide
Hips toward the ball at impact (early extension)	7.5 cm	5.0 cm or less	above
Head drop at impact (+ = lower)	1.7 cm	−5.0 cm to 5.0 cm	in guide
Trail knee straightens by the top	24°	15° or less	above
Downswing hand path vs backswing, halfway (+ = further out)	8.7 cm	3.0 cm or less	above

The guides are the app's starting points from common coaching, not limits, and a number outside one is something to look at, not a fault in itself.

The spine angle held to the edge of its guide, but the hips moved 7.5 cm towards the ball by impact — the measurement behind early extension. The trail knee straightened 24° on the way to the top, and on the way down the hands came 8.7 cm further from the body than on the way up. Spine angle at address covers how posture is read down the line.

Centimetres are scaled from the golfer's height, and every position is read from one camera's 2D view — so these are best compared with the same golfer's own swings, filmed the same way.

Open the full report

The shared report is the real thing, view-only: play the video with the skeleton over it, scrub the charts, and read every joint on every frame. Nothing to sign up for.