Z/2ZoneTwo

Blog · Training science

Writing for athletes who read.

Practical writing on training load, monotony, multi-sport balancing, and what it means to be coached by an AI. Written from the coach’s chair, not the marketer’s desk.

April 22, 2026 · triathlon · multi-sport · monotony

Why single-sport coaches fail triathletes

A running-only plan plus a cycling-only plan isn't a triathlon plan. Three real failure modes from coaching each sport in isolation, and what combined-load modeling solves.

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April 24, 2026 · recovery · readiness · decision making

Should I train today? A decision framework

The 6 AM question every amateur athlete asks. A concrete decision framework using readiness score, subjective feel, and scheduled session type — including when to override the app.

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