Meet StrideLab: Run Form — Running form from a slo-mo

Health & Fitness

StrideLab: Run Form

Running form from a slo-mo

What StrideLab: Run Form does

A treadmill gait analysis costs about $150 and a trip to a clinic. StrideLab reads the same clinic-style running-form metrics from a single slow-motion phone clip — right on your device, in seconds. Strava and your watch track pace and distance. They never look at your form. StrideLab does.

Film 5 to 10 seconds of yourself running past your phone in slow motion, from the side. StrideLab uses Apple's on-device Vision framework to trace your body's joints frame by frame, then measures the things a gait lab measures: cadence, overstride, foot strike, vertical oscillation, knee flexion, and pelvic drop. Scrub the clip with a skeleton drawn over your body to see exactly what your legs are doing at contact.

Then read the report. Every metric is shown as your value against its target with a plain-language explanation and a green, amber, or coral flag, ordered worst-first so you know what to fix. Landing with your foot way out in front of your hips? That is overstride, and it drives impact straight up through your knee. Cadence a little low? A quicker turnover shortens each step and lightens every landing. For each thing that is off, StrideLab gives you a targeted drill — a cadence metronome, soft-knee landings, hip-stability strength — with how-to steps and a weekly dose.

Running form changes slowly, so StrideLab keeps a trend. Save each analyzed run and watch your cadence rise and your overstride and pelvic drop fall week over week, charted against the target band.

Everything is private and offline. Pose detection runs entirely on your phone — there is no account and no server, and your running videos never leave your device.

StrideLab is a training and wellness aid that estimates form from video. It is not a medical gait diagnosis or a certified measurement. For pain or recurring injury, see a sports-medicine professional or a physical therapist.

• Six clinic-style form metrics from one slow-mo clip, analyzed on-device • Frame scrubber with a skeletal overlay drawn on your body • Your-value-to-target report with green/amber flags, ordered worst-first • Targeted drills for each issue, with how-to steps and a weekly dose • Form trend across sessions, charted against target bands • 100 percent offline and private — no account, no upload • Try it instantly with the built-in sample clip

A look inside

Tap any screenshot to open the full-resolution version.

What's inside

• Gait metrics — Cadence, overstride, vertical oscillation, pelvic drop.
• Skeleton overlay — Scrub your stride with the pose drawn on.
• Form trend — Watch your metrics improve over weeks.

Why we built it

Running apps track pace and distance but never FORM; real gait analysis means a $150 treadmill lab visit.

What makes it different

Vision body-pose analysis of one slow-mo clip returns clinic-style gait metrics with a skeletal overlay — on-device.

Who it's for

Built for anyone who values fast, private, on-device software with a calm, focused UX.

In one line: Running form from a slo-mo

Try it

See the Running form from a slo-mo for the full feature list, the info table, and support links.

Use StrideLab: Run Form, found a bug, or have a feature request? Comments are open below — anonymous is fine.