Self-Coached · AI-Assisted

Split.

A rule-based training-plan engine with an AI coaching layer. Tuned for tropical-heat races like the Pattaya Marathon. Answer the brief, generate a week-by-week table, then copy, email or print it for a friend.

⌁ AI Coach · live weather + real route research · tropical-heat aware

The Brief

Race / Run Date * Sets total weeks → progression & taper

Goal Distance * Drives long-run peak & weekly volume

Target Completion Time * Example: 10K → 01:00:00 · Half Marathon → 02:15:00 · Marathon → 05:00:00

Days / Week to Run * How many sessions to schedule

Comfortable Weekly Distance now (km) Optional — keeps the build safe & feasible

Age Recovery & progression caution

Available Weekdays * Tick the days the plan may place runs on — the long run prefers a weekend if you select one.

Gender General norms

Height (cm) Profile

Weight (kg) Load / fuelling

Place of Run * City / area — weather & nearby routes

Medications / Health Notes Flags the waiver and a “consult a professional” note

Advanced · AI Coach server endpoint

The AI Coach is powered by a server proxy you deploy (see the included Worker). Your Anthropic key lives only as a server secret — it is never sent to, stored in, or readable from this page, so the file is safe to share publicly. The server also enforces a hard daily limit that cannot be bypassed by clearing the browser. Leave blank to use the endpoint baked into the page config; fill in to point at a different deployment.

The training engine is deterministic and runs locally. The AI Coach runs through a server proxy that holds the key and enforces a hard limit of 3 plans per day per person — if the limit is reached or the service is down, you’ll be told and (for non-quota errors) a full rule-based plan still generates with general guidance.

Split.

The Brief

Your Plan

Coach Notes

Meal & Fuel Suggestions

Running Routes Near

Waiver & Disclaimer