Standing Start (2-Point)
Coaching analysis of a 2-point standing start: set position, first push, takeoff projection and first-step efficiency.
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: direction of the lane.
Side view, 90° to the lane. All start metrics.
How high, and how it should sit
Framing
Full body head to toe; feet, hands and torso not cropped through takeoff and the first 2-3 steps.
Hold the phone landscape.
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 12 ready
All the camera settings
Every setting shows where it came from.
- Camera height
- No height is given. Keep it the same every session.
- Our guidance
- Distance
- No published distance exists. Stand back far enough that the full movement (arm circle, stride, follow-through) stays in frame with room to spare. Use the 1x lens and move your feet, not the zoom. The athlete head to toe must stay in frame from the set position through takeoff and the first two or three steps.
- Our guidance
- Frame rate
- 60+ fps (recommended 60). 60 fps recommended; higher only if the clip stays bright and sharp. Slow-motion saved at normal speed works if you enter the recorded rate.
- From published guidance
- Resolution
- 1080p or better
- From published guidance
- Orientation
- Hold the phone landscape.
- From published guidance
- Lens and zoom
- Use the 1x lens with no digital zoom. Avoid ultra-wide and fisheye lenses.
- From published guidance
- Lighting
- Bright, with a clean background so the athlete separates from it in every frame.
- From published guidance
- Stability
- Tripod or fixed support is required.
- From published guidance
- Calibration
- No calibration is needed for angles. Distances and speeds need a scale (see Calibration).
- From published guidance
Before you start
- Stand motionless in the 2-point posture before the gun.
- Record 3-5 clean starts.
Cues for the athlete
Plain coaching cues, one thing at a time.
set
- Set the front shin where you want to go so the first push projects out, not up.
- Roll onto the balls of the feet with the nose over the toes before the gun.
first move
- Push immediately off both legs when the gun goes.
- Punch one arm forward while the other drives long behind you.
- Keep the chin quiet and the eyes slightly down the runway.
takeoff
- Push out, not up, with the chest leading forward.
first contact
- Win the first step by covering ground; strike and go.
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.