MotionLab

100m Sprint

Front View • 4/28/2026

Subject: marked at 4.2s
Skeleton
Labels
Frame-by-Frame Comparison

3 frames extracted • Click arrows to navigate

Frame 1
1.39s
Frame 2
6.97s
Overall Assessment

The athlete is at the starting blocks, largely obscured by other individuals and equipment. Due to the lack of clear visibility, most biomechanical metrics cannot be accurately assessed. Recommendations are based on general principles for sprint starts, assuming a typical pre-start setup.

Recommendations
  • •Ensure clear visibility of the athlete in future recordings for accurate biomechanical analysis.
  • •In a typical sprint start, focus on maintaining a strong, balanced crouched position with even weight distribution.
  • •During the 'set' position, hips should be slightly higher than shoulders, and shins should be parallel to the ground.
  • •Eyes should be focused down and forward, not directly at the finish line, for optimal head and neck alignment.
Biomechanical Metrics

Comparing to Youth (U14) targets — Developmental — focus on movement quality over precise targets

Trunk lean angle

Athlete obscured, unable to accurately assess trunk lean.

N/Adegrees from vertical
Youth (U14) range:2.9–17.1°· USATF acceleration phase

Knee drive angle

Athlete obscured, unable to accurately assess knee drive.

N/Adegrees
Youth (U14) range:80.7–109.3°· Elite max-velocity sprinting

Ground contact posture

Athlete obscured, unable to accurately assess shin angle at contact.

N/Adegrees
Youth (U14) range:76.8–98.2°· Shin angle at touchdown

Arm angle

Athlete obscured, unable to accurately assess arm angle.

N/Adegrees
Youth (U14) range:75.7–104.3°· Elbow flexion during drive

Head position

Athlete obscured, unable to accurately assess head position.

N/AN/A
Youth (U14) range:-2.1–12.1°· Neutral cervical alignment
Recommended Drills

Targeted exercises for metrics flagged as needing attention

Wall Drive Acceleration

beginner

Lean against a wall at ~45°, drive knees alternately while maintaining a straight line from ankle to head. 3×20 reps per leg.

⏱ 10 min· Targets: Trunk lean angle

Resisted Sled Push

intermediate

Push a sled with 20–30% bodyweight for 20m, holding strong forward lean. Forces correct acceleration posture. 4 reps.

⏱ 15 min· Targets: Trunk lean angle

A-Skip Progression

beginner

Tall skip with high knee drive (thigh parallel to ground). Emphasize sharp dorsiflexion. 3×30m.

⏱ 10 min· Targets: Knee drive angle

High-Knee Marches with Hold

beginner

March in place driving knee to 90°, hold 2 seconds. Builds hip flexor strength and proprioception. 3×10/leg.

⏱ 8 min· Targets: Knee drive angle

Pogo Hops

intermediate

Stiff-ankle vertical hops on the balls of feet. Teaches reactive ground contact. 4×15 reps.

⏱ 10 min· Targets: Ground contact posture

Dribble Bleeds

intermediate

Quick low-amplitude foot strikes progressing to full sprint. Reinforces directly-under-hip touchdown. 4×30m.

⏱ 12 min· Targets: Ground contact posture
View Technique Guide
Key Moments

Starting position

Athlete is in a crouched starting position at the beginning of a sprint race. The athlete is mostly obscured by hurdles and other people, making detailed analysis difficult.

Coaching Notes