Two free tools to understand your body — a 9-phase running form scan and a 30-minute metabolic power profile.
A growing suite of tools and services built around the science of endurance performance — for athletes at every level.
Upload your running videos and run the gait-phase scan — at no cost. Unlock the running form report with a one-time pass — less than a pair of running shoes or a single visit to a physical therapist, and the insights don't wear out.
Open esFormLab →Build your free metabolic profile from four max efforts — VO₂max, lactate threshold, training zones, and your fat-burning sweet spot. Optional measured-lactate upgrade for the real numbers.
Open esMetabolicLab →Our athletes range from sub-4 minute milers to beginners looking to complete their first marathon — we customize the plan to your goals, experience and schedule. Weekly check-ins, adaptive planning, and direct access to your coach — not a chatbot.
Open coaching dashboard →
No specialist equipment. No lab visit. Three short clips from your phone and a browser is all you need.
Capture a side, front, and back view of your stride — treadmill or outdoor track, phone camera is fine. MP4, MOV, or WebM. Your videos never leave your device and are never uploaded to a server.
The tool identifies key moments in your stride: left and right foot strike, left and right toe-off, mid-stance, peak knee flex, and terminal swing — plus mid-cycle frames from the front and back views.
Each phase shows a skeleton overlay with angle arcs and a detection-quality readout. Scrub frame by frame to land on the right moment, with plain-language coaching guidance built in.
Upload & scan at no cost on a free account, then unlock the running form report with a one-time pass — detected issues like overstriding, hip drop, and knee valgus with severity grading and coaching cues, plus joint angles across all 9 phases graded against elite reference ranges and a downloadable PDF.
We build tools that translate lab-grade physiology into actionable insight — without requiring a lab, a team of scientists, or an elite contract.
Data without context is noise. Every number we surface comes with an explanation of what it means for your performance and how to act on it.
Physiology is individual. Reference ranges are starting points. The goal is to build a picture of your own body over time — not compare you to an abstract average.
Accessibility matters. Lab-grade analysis shouldn't require a lab. We're building tools that bring the science to any athlete, anywhere, at any level.
Create your free account in one tap — get your running form scan and your metabolic power profile, both free to try. No card required.