Warning Signs You're Progressing Too Fast The Objective Checklist
Watch three objective signals: resting heart rate elevated 5+ bpm above your baseline for 3+ consecutive mornings, long-run soreness that hasn't resolved within 48 hours, and two or more consecutive nights of disrupted sleep coinciding with the buildup. One signal alone is a caution — two or more together means stop and back off, not just note and monitor. Below: why these three beat "just listen to your body," the response ladder for one signal versus three, and how to tell this apart from normal long-run fatigue.
You're mid-buildup, uneasy about how quickly your long run is climbing, or you've got a nagging symptom you can't quite place — and every generic "listen to your body" article leaves you no closer to knowing whether to push on or pull back.
Why These Three Signals — Not Just "Listen to Your Body"
Resting heart rate and sleep disruption work as objective autonomic-fatigue proxies precisely because they're not subjective — you can't talk yourself out of a number on a chest strap. Soreness itself is expected after a long run; that's normal training stress, not a red flag. The diagnostic signal is duration — 48+ hours — and trend, getting worse week over week rather than easing. Presence of soreness on its own tells you almost nothing useful.
What to Do When One Signal Shows Up: The Response Ladder
This is the part most guides skip — naming the symptom without saying what to actually do about it.
| Signal count | Response |
|---|---|
| One signal | Keep the long run distance flat this week — freeze, don't cut |
| Two signals | Cut the long run 20-25% this week and take one additional full rest day |
| Three signals, or one persisting past 7 days | Treat as a mandatory step-back week regardless of the calendar; flag for a coach or medical check if resting HR stays elevated past 10 days |
This overrides your calendar-based step-back-week schedule whenever the two conflict. I've watched runners keep advancing their long run through a single bad-sleep week because "it wasn't their step-back week yet" — and end up needing a full extra step-back week later to dig out of it. Freezing at one signal, rather than just noting it, is what prevents that spiral.
How This Differs From Normal Long-Run Fatigue
| Normal fatigue | Too-fast progression | |
|---|---|---|
| Soreness | Resolves within 48 hours | Compounds week over week |
| Resting HR | Returns to baseline within 24-48 hours | Stays elevated |
| Sleep | Fine, or one off night | Disruption repeats |
This distinction cuts both ways. I've coached a runner who mistook ordinary post-long-run soreness for an overtraining signal and needlessly repeated a step-back week she didn't need — missing real signals and over-reacting to normal fatigue both cost you training time, just in different directions.
Back to the full long run progression hub, or find your base's specific progression table if you're not sure whether your current buildup is actually on schedule.
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About the author
Dominique de Rooij (Dom)
Advanced Running Coach certified by Athletics Australia with 20 years of writing about running and over a decade coaching runners, from first races to marathons. Dom created PlanMyRace, a training plan generator for any race from 1500m to the marathon. Now over 50, Dom still loves trail running, parkrun, and the coffee after.
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