Analyze your running form.

One side-profile running photo. Nothing to install.

Gemini scores your form; the cloud rebuilds you in textured 3D with every zone marked.

A coach walkthrough with captions, then spin the model and tap any zone.

Running form is how your body moves when you run — posture, foot strike, knee drive, arm swing and lean. Small flaws raise injury risk and waste energy.

Yes for visible mechanics — foot strike, overstride, lean, knee drive, arm swing, head and hip alignment, each judged view- and phase-dependently. What a photo cannot show — cadence, contact time, bounce, forces — needs video or sensors, so it is never guessed.

Upload one side-profile running photo. RunForm scores each form zone with AI and rebuilds you in 3D so you can see every flaw and fix.

Land with the foot under the hips instead of reaching ahead: lift cadence slightly, run quieter, stop reaching. Cue: land under hips, quiet feet. Full overstriding guide →

Not by itself — most runners, even elites, land rearfoot. The red flag is heel strike plus overstride, a locked knee and low cadence, which together create braking force. Isolated rearfoot contact under the body is acceptable. Foot-strike guide →

Forget 180 as a magic number — ideal cadence is individual. The evidence-backed move is raising cadence 5–10% above your own preferred rate, which cuts hip and knee loading. Cadence guide →

Work one zone at a time with a cue and a drill — e.g. land with your foot under your hip, then practice with short strides. Re-test with a new photo. All 7 zone guides →

Most recreational runners score 55-75 out of 100. Anything under 60 usually means two or more zones need drills.

Each visible zone scores 0–100 (optimal 85+, fair 60–84, critical below 60) and the overall is the rounded average. Guardrails keep it honest: any critical zone caps the total at 70, two or more cap it at 60.

Systematic reviews on running-injury biomechanics (Willwacher 2022; Ceyssens 2019), the evidence-based video-analysis framework (Souza 2016), cadence-loading studies (Heiderscheit 2011), and foot-strike work (Lieberman; Cavanagh & Lafortune; Xu 2021). Key papers: cadence & joint loading · video analysis framework · foot-strike meta-analysis · biomechanical risk factors.

Cadence, ground-contact time, vertical bounce, loading rate, leg stiffness and pronation speed all need time-series, video or force data — so they are never guessed from your photo, only prescribed as drills where the evidence supports them.

Overstride mechanics feed hamstring strain and raise tibial loading, and high loading rates are tied to stress fractures — which is why braking force, not foot strike alone, is what gets flagged. Fix overstriding →