Running

Pace is the target. Load is the point.

Runs don't sit in a separate app pretending they didn't happen. They land on the same fitness and fatigue curve as everything else you do, with targets written as a share of your threshold pace.

75cited running workouts and 7 plans, scored as rTSS from threshold pace.

What your coach sees

What a running coach needs. Exactly.

rTSS, from your threshold pace

Every run is scored against your own threshold pace rather than a generic table, so an easy hour and a threshold session land where they belong. The same CTL, ATL and form numbers your rides feed.

RunningExample
Line
Pace · with strides at the end
Load
rTSS from threshold pace
Library
75 workouts · 7 plans

Fifty-three sessions, each one sourced

Strides, hill sprints, cruise intervals, long-run builds and a full couch-to-5K progression — transcribed from a research dossier with citations on every entry, not generated from a template. Seven programmes, from first 5K to a marathon build.

Send it to the watch

Any prescribed run exports as a Garmin/Wahoo .fit file with targets held in percentage terms, so the watch scales them to its own threshold rather than to somebody else's.

LibraryRunning
Workouts
75, each cited
Plans
7 multi-week
Curve
Fitness · fatigue · form

No invented numbers.

Load is rTSS — your run's pace measured against your threshold pace, weighted by how long you held it.

In the catalog75 workouts · 7 plans
Hand-authored from a cited research dossier. Every entry carries its sources and an honest note about what the evidence does and doesn't say.
DisciplinesRoad · Trail · Treadmill · Track
Tracked as distinct work, because they are.
Send it to your deviceGarmin & Wahoo
A file you download and load yourself. Targets held in percentage terms so your device scales them to your numbers, not somebody else's.
Arrives on its ownStrava · Apple Health
Matching activities import automatically, so you don't log the same session twice.
Your coach, in your AI appClaude · ChatGPT · any MCP client
Helios runs no model of its own. It hands your coach the numbers and the coach lives where you already are.

Helios opens up slowly.

Every new athlete gets set up by hand right now: real zones, a real plan, no template. Leave your email and you'll hear from us as spots open.

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