Biometrics: Video Analysis and Coaching Guide

This guide is for the 3-point turf start profile in the Launch app. Train the highest-impact fixes first.

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In the app selector, choose Combine Start. The sample below is a report with a 55/100 start score. Biggest gains are in down-hand setup, first-step shin attack, and turf-clearance projection.

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Video recording guidelines for turf start analysis

Part 1: Record The 3-Point Start

Wrong camera setup gives wrong coaching. Keep this simple and repeatable.

  • 1. Side-view, landscape: record from the side at 90 degrees to the lane, phone horizontal, full body in frame.
  • 2. Steady camera: use a tripod. Handheld shake makes event timing and angle values unreliable.
  • 3. Camera settings: minimum 60 fps at 1080p. Higher frame rates help only if lighting stays clean.
  • 4. Bright lighting: athlete and turf markings should stay sharp in every frame.
  • 5. Start in set: begin recording once the athlete is fully set in the 3-point stance, then execute one clear start.

Keep the camera location and stance side consistent between sessions, otherwise trend comparisons are not worth much.

Turf start report card with metrics and coaching points

Part 2: Read The Report Card

Sample report: Start score 55/100, Direction Left.

The key moments in this sample are: Set 0.000s, First Move 0.459s, Turf Clearance 0.742s, Touchdown 0.900s. Work through red FIX items first.

Front Shin Angle (Set)

42° OKAY | Target 45-60°

Attack angle in 3-point set. If too vertical, drop hips and push front knee farther over toe to direct force horizontally.

Shoulder-over-Wrist Offset

-0.12 body FIX | Target -0.02 to +0.08

Signed horizontal offset from down-side wrist to shoulder. Stack shoulder over wrist or slightly ahead before launch.

Rear Knee Angle (Set)

122° FIX | Target 90-110°

Rear preload geometry in set. Tighten rear setup so you can strike backward off the turf on push one.

Trunk Angle (Set)

23° GOOD | Target 10-28°

Set posture line from hip to shoulder. Flatten the back and keep hips only slightly above shoulders.

Projection Angle (Turf Clearance)

34° FIX | Target 40-45°

Body projection at clearance. Project forward, not up; keep head down and push turf back through clearance.

Down Hand Lift Time

0.459s FIX | Target ≤ 0.18s

Time from frame-0 set posture to sustained down-hand lift. Reduce hesitation and trigger one clean explosive action.

Trunk Angle (Turf Clearance)

11° FIX | Target 30-45°

Forward lean at clearance. Stay down through the first push so force stays horizontal.

What The Score Means

55/100

A workable baseline. It is not a disaster, but there are obvious setup and launch leaks to fix before chasing finer details.

Coaching Priorities

Fix the launch mechanics in this order.

Veteran coach rule: use the report to narrow focus, not to flood the athlete. Fix two variables, retest, and confirm the change on the next clip.

Turf start coaching priorities from report card

Practical Session Plan

Use the same surface, same camera lane, and same stance side to make comparisons honest.

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