Cues, not corrections
"Drive your knee" beats "your knee was a little low." Cue-based coaching gets the change to happen in the next rep, not the next month. AI prescribes cues for what it sees, not just diagnostic notes.
Javelin tips are everywhere. Most are generic. Here are the cues real javelin coaches use, short, specific, and tied to the phase of the rep where they apply. Pair them with AI form check and you have a feedback loop that closes.
"Drive your knee" beats "your knee was a little low." Cue-based coaching gets the change to happen in the next rep, not the next month. AI prescribes cues for what it sees, not just diagnostic notes.
Most athletes try to fix three things at once and fix none. Pick one cue per rep, see what it does, then iterate. The AI surfaces the one cue that would close the biggest gap in your javelin.
A cue is only useful if it triggers in the right phase. "Heel down" means nothing without a moment to apply it. Each AI tip is timestamped to the phase of javelin it belongs to.
Generic tip lists are everywhere. Tips tied to your specific form errors are not. Upload a clip and AI returns the 1-3 cues that would change the most in your javelin, ranked by impact.
Follow up in chat and ask questions. The AI remembers your analysis and speaks the language of javelin coaching.
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.
6-10 strides at moderate pace, building to controllable speed (5-6 m/s elite). Not a sprint; control is critical.
2-3 lateral crossovers preceding the throw. Right foot crosses behind left (RH thrower), turning the body sideways.
Last crossover lands long, lowering CoM. Loads the throwing leg.
Front (left) leg plants firmly to stop forward momentum, converting it to rotational and vertical lift via the trunk and arm.
Trunk arches and unloads (whip), arm comes through last (kinetic chain). Javelin released at 30-36 deg with velocity 28-30 m/s elite.
Right leg lands forward to absorb momentum. Stay behind the foul line.
Primary sources behind the numbers and methods on this page.
Five common questions about javelin that come up in coaching.
A directory of every javelin 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.