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About Me

Plan Builder

Build your own race plan.

Tell me what you’ve raced and what you’re aiming at. You’ll get an honest read on the goal, your training paces, goal-pace splits, and a week-by-week build — the same shape as my own race plan, generated for your races. Everything runs in your browser; nothing is sent anywhere.

About you

Age sets your heart-rate zones. Sex and height are recorded on the export but don’t change the plan — no formula here uses them.

If you’ve ever seen a higher number on a watch, use it. An age formula that’s 15 bpm low makes every easy day read hot.

Where you are now

That last one matters more than it looks. If you’re in a down week right now, it stops the plan from mistaking a deload for your ceiling.

Races you’ve run

Recent and comparable races count most. A 100K won’t be used to predict a marathon — it’s the wrong direction to extrapolate.

Races you’re aiming at

Leave the goal time blank and I’ll suggest one from your projected fitness. Two races in a row build as back-to-back blocks.

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