Most marathon runners in a build phase do the same thing after every run:

Something feels tight. They foam roll it. They stretch it. They wonder if they should skip tomorrow's workout. They don't skip it. They worry the whole time.

Next day, same cycle.

Here's the problem: you're treating symptoms without a system. Tight calves and sore feet are signals, not diagnoses. And the signals don't all mean the same thing.

I spent years coaching runners through build phase weeks and watching the same pattern: a runner feels something, panics, overcorrects, loses a training day, then catches back up too fast.

So I built a framework around 3 questions that take five minutes before any run:

1. Where is it? Location matters more than intensity. Calf tightness at the Achilles insertion means something different than tightness mid-belly.

1. Has it changed from baseline? Not "does it hurt" — but "is this different from yesterday?" Your body has a baseline. Learn it.

1. What happens in the first 200 meters? If it clears up, you're green. If it shifts but doesn't worsen, you're yellow. If it gets worse, you're red.

Green = run as planned.

Yellow = run, but swap the workout to easy pace.

Red = walk home and reassess.

That's the entire decision. No guesswork. No foam rolling for 30 minutes hoping it helps. No Googling "is calf tightness a sign of a stress fracture" at 5 AM.

The runners who finish build phase on schedule aren't the ones with perfect bodies. They're the ones who make fast, clear decisions about what their body is telling them.

I put the full system — the traffic light check, the load management framework, the 14-day tracking checklist — into an eBook you can use starting on your next run.

If tight calves and sore feet have been stealing your training days, this is how you take them back.