Blog
Training science, race prep and event guides for endurance athletes.
28 May 2026
May Updates: Loads of new features, with a catch
A teaser of things to come — the month we built the relaunch that became BEINA.
24 April 2026
April Updates: A Proper Fitness Model, a New Status Page, and In-Chat Reports
A proper two-dimensional fitness model, a redesigned status page, RPE feedback, and in-chat reports.
24 April 2026
Fit, but for what?
One month down a sports-science rabbit hole — and how it changed the way we track fitness, fatigue and form.
30 March 2026
March Updates: Coach V5, Garmin Integration, Predictions for Everything
The Coach rebuilt from the ground up, Garmin officially in, and AI predictions for 13 events.
18 February 2026
February Updates: Race Planning, Journalling, and Secondary Events
An improved race-planning interface, a journalling system that makes the Coach smarter over time, and support for events beyond the Puffer.
17 February 2026
The Slush Puffer, and Other Stories from the Forest
Was 2026 really the slowest Puffer to date? Looking over 16 years of race data, we think it probably was.
26 January 2026
January Updates: Post-Puffer Analysis, 15 Years of Data, and More
Post-race analysis tools, 15 years of historic Strathpuffer data, and a memory upgrade for the Coach.