Phase-by-phase break
Your sprints broken into the phases coaches grade. AI tells you which phase is costing you the most and why.
Sprints form check on demand. Upload a clip of your sprints and AI flags every break in technique with priority tags, what's critical, what's minor, plus the drill that fixes each one. The same form-check feedback you'd post for online, private and immediate.
Your sprints broken into the phases coaches grade. AI tells you which phase is costing you the most and why.
When a coach says "your form is off," you don't always know where. AI marks the exact frame the error appears, with a coaching note attached.
Every flagged error comes with the drill that targets it. No generic homework, no guessing what to work on next session.
You'll see priority-tagged technique notes, the specific frames where the form breaks, and the drill that targets each issue. It's a full sprints form check in under a minute, the kind you'd pay an expensive remote coach for.
Follow up in chat and ask questions. The AI remembers your analysis and speaks the language of sprints coaching.
Each fault below is described two ways: how it looks on video (so you can recognize it on your own clips) and the drill or cue that fixes it. AI form check identifies these patterns in the same frames a coach would.
You reach full upright posture in the first 5-7 meters instead of staying angled forward through 15-20m.
Drive-phase wall pushes and resisted sled starts to groove a lower angle for longer.
Your front foot is landing ahead of your center of mass in steps 2-4, creating a braking force every step.
Short, punchy first-step drills with a focus on foot contact behind the hips.
Your hands swing past the center line instead of front-to-back, leaking rotational energy.
Arm-swing mirror drills and 'paint the line' focus cues at jog pace.
Each phase has a coaching cue, a measurable target, the frames a coach pauses on, and the failure mode AI flags most often. Use it as a self-diagnostic checklist on every video.
Set position, drive angle, and the first 2 strides out of the blocks. World-class sprinters reach ~33% of their max velocity by block clearance, in only ~5% of total race time.
Forward body lean, longer ground-contact times, aggressive horizontal force. The 100m is built or lost in this phase.
Body angle rises smoothly from drive to upright. Stride length grows; ground contact shortens. Speed approaches max.
Top-end speed phase. Vertical force dominates; ground contact ~0.09-0.10 s. Elite peaks at ~11.2 m/s, around 6.27 s.
Holding form through 80-100m as ATP-PC stores deplete. The race is decided here in close finishes.
Primary sources behind the numbers and methods on this page.
Five common questions about sprints that come up in coaching.
A directory of every sprints page on the site, from broad analysis tools to specific phase deep-dives. Each entry points to a focused write-up.
Download the app. Film a rep. See what the AI sees. Free first analysis, no card, no account required.