JAMES RAYBOULD
Private build

Mettle

A HYROX coach that knows exactly what you did last Tuesday.

Next.jsClaudeUpstashVercel

The idea

Generic training plans fall apart the moment life interferes. Mettle holds the full history — every session, every race, every PR — and adapts the plan around what actually happened rather than what was scheduled.

Mettle — The idea

The coach

The AI coach answers in context. It knows the race target, the current block, and last week's volume, so "should I push today?" gets a real answer instead of a disclaimer. Having the full training log is what separates it from asking a chatbot the same question.

Mettle — The coach

The target

Built around a specific goal: qualifying for the HYROX PRO Men 45–49 field. Race results and splits feed straight back into the plan.

Mettle — The target
This one runs on my own data, so there's no public login — the screenshots above show what it actually does.