Why an independent cycling lab?
A note on making focused tools, showing the work and keeping the rider larger than the data.
Read the founding noteÉchapper Journal
Read notes from the road, workshop and code.
An independent publication about cycling, training data, useful software and the decisions that sit between them.
BY DESIGN.Methods for clearer cycling tools
More from the lab
Guides and decisions
worth keeping.
Connect Training Companion to Claude
A complete guide to adding Échapper as a remote connector, checking the training context and reviewing controlled changes.
Read storyUse Training Companion with ChatGPT
Connect ChatGPT to your training context and review explicitly approved changes.
Read storyWhy ChatGPT is read-only for now
Historical launch decision, superseded by optional controlled write access on 14 September 2026.
Read storyThe editorial index
Browse the Journal by subject.
Methods
How we reason about training data, uncertainty and useful software.
Product Notes
What we are building, changing and learning from each release.
Guides
Practical ways to use Échapper, Intervals.icu and compatible AI clients.
Publishing principle
We show the work
instead of filling a feed.
We will publish when there is something worth keeping: a useful method, a field observation, a product decision or a guide that makes the next step clearer.
Follow the Journal feed