Ultra and trail coaching, built on physics.
Sigwren is the coaching platform for ultra and trail. It decodes the race your athlete is actually running, measures where they are today, and builds the training that gets them to the start line ready.
No card required. Full platform access. Bring your own athletes or test with ours.
Every climb, every descent, every kilometre likely to be run in the dark. Heat windows, technical sections, cutoff pressure by segment. Sigwren turns a GPX file into a full race demand profile so you know exactly what your athlete is preparing for.
Sigwren combines a full athlete assessment — movement screen, running form, metabolic profile, and trail-specific capability tests for climbing, descending, and technical running — with continuous data from their watch. Eccentric load from descents is modelled and carried forward into recovery and race prediction. Every number has an error band. Every capability is testable. No black-box scores. No vibes.
The training plan exists to move the athlete's profile closer to the race's demands by race day. Every session has a purpose. Every week narrows the gap. Sigwren does the reasoning so you can do the coaching.
Built on peer-reviewed physiological models. Minetti gradient cost, Mader metabolic solver, Jeukendrup fuelling, Morton critical power, Cox injury hazard, Foster monotony and strain. Every prediction ships with its error band.
