A marathon plan built from your running data
Your history already knows how fit you are. TERUN turns it into a plan instead of a generic template.
Generic marathon plans start from a goal time and hand you the same paces they’d hand anyone. But you already have months of runs recorded that say exactly how fast you run and at what heart rate. TERUN reads that history and builds a plan paced to your fitness — then keeps it in sync as you train.
What TERUN reads (and what it doesn’t)
It uses only the minimum needed to build a plan: your list of activities and, per activity, date, sport type, moving time, distance, average and max heart rate, cycling power when available, and the activity name. It does not touch your messages, followers, or private notes. You can disconnect any time, which deletes the stored token. Full detail on the support & privacy page.
From history to plan in four steps
Connect
Link your account. Your recent activities load automatically.
Estimate
It reads steady segments, fits pace vs. heart rate and predicts your race time.
Set the goal
Pick marathon or half marathon and a date; it periodizes base → build → peak → taper.
Adapt
Every week it re-paces and reconciles against what you actually ran.
Why data-driven paces matter over 16 weeks
In a marathon block your fitness changes a lot. A fixed plan bakes in day-one assumptions, so your easy runs drift too hard and your long-run pace stops matching your form. Because TERUN’s paces float on your measured fitness, easy stays easy and quality stays honest — the whole way to the start line.
Cross-training counts too. Cycling and swimming give a small, conservative boost to your estimate, and strength work is folded in as a recovery constraint — so your plan reflects your whole training week, not just the runs.