Disc Throw Analysis (Ultimate & Disc Golf)
Throw-family-aware analysis for backhand, forehand, overhead, roller and putt: phase timing, base and plant, arm geometry, wrist sequencing, release and recovery balance.
How far has this tool been checked?
The measurements were checked against computer-drawn athletes whose true answers are known exactly. That shows the arithmetic and the event rules are right under clean, controlled conditions. It does not measure how well the body-tracking model sees real people (water, loose clothing, crouching, fast limbs) and has not been compared with a lab or a coach’s stopwatch. Treat the numbers as an aid, and use the confidence label beside each value.
Where the camera goes
Seen from above. Angles are measured round from the front of the athlete; 90° is square-on from the side. Reference line: main throw direction.
Throwing-arm-side view, perpendicular to the throw. All disc metrics. Avoid filming from directly behind or in front.
How high, and how it should sit
Framing
Head to both feet, the disc, and the early flight.
The 50–75% band is our own guidance. No published source gives a camera distance in metres, so use it as a starting point and adjust until the whole movement fits.
Ready to record?
Tick each item as you set it up. This is a reminder, not a lock.
0 of 11 ready
All the camera settings
Every setting shows where it came from.
- Camera height
- Around hip-to-chest height.
- From published guidance
- Distance
- Far enough that every body joint and foot stays visible. No numeric distance is published.
- From published guidance
- Frame rate
- 60+ fps. 60 fps or faster. Select the capture rate you recorded at. Selectable capture rates: 30, 60, 120, 240, 1000.
- From published guidance
- Resolution
- 1080p recommended
- From published guidance
- Orientation
- Landscape or portrait both work.
- From published guidance
- Lens and zoom
- Use the 1x lens with no digital zoom. Avoid ultra-wide and fisheye lenses.
- From published guidance
- Lighting
- Avoid backlighting.
- From published guidance
- Stability
- Level and stable. Avoid handheld panning and camera cuts during the throw.
- From published guidance
- Calibration
- No calibration is needed for angles. Distances and speeds need a scale (see Calibration).
- From published guidance
Before you start
- Declare the throw: family, context, intended shape, stance, throwing hand, pose model and capture frame rate.
- Avoid distant athletes, busy backgrounds, other discs in view and bodies crossing the frame.
Safety
- Keep the device and camera operator outside the throw and flight corridor.
Cues for the athlete
Plain coaching cues, one thing at a time.
No cues are published for this tool.
Why camera position matters
Research behind these rules.
2D angles are only trustworthy when the limb moves in the plane the camera sees. Camera-side joints are measured more accurately than far-side joints, and timing is only as fine as one frame.