Not every ache after a run needs a practitioner. Some of it is the body adapting. Some of it is a real problem starting to build. The trick is knowing which one you're looking at before it costs you a training block.
Every runner has the same internal argument. Something hurts. You don't want to stop training. You don't want to overreact. So you tell yourself it'll settle down. Sometimes it does. Sometimes you end up three weeks deep into a stress reaction that started as "probably nothing."
Here's how to sort one from the other.
The Two Kinds of Running Pain
Almost every ache from running falls into one of two buckets: training soreness or tissue irritation. They feel similar for the first day or two. They behave very differently over the course of a week.
Training soreness
Comes on within 24 to 48 hours of a harder session. Sits in the muscle belly, not on a specific structure. Stiff when you start moving, loosens up once you warm up. Gone in 2 to 3 days without anything special. This is your body adapting, and it's a good sign.
Tissue irritation
Shows up on one specific spot you can point to with a finger. Often on a tendon, a bone, or a joint line, not in the middle of a muscle. Gets worse as the run goes on instead of warming up. Lingers into rest days. Comes back the moment you start running again. This is the one that deserves attention.
The 3-Run Test
If you're on the fence, give it three runs. Not three weeks. Three runs.
- Run 1. Pain during. How does it compare to the last run? Better, same, or worse?
- Run 2. Pain after. Is it gone by the next morning, or is it still talking to you at 24 hours?
- Run 3. Pain the next day. If it's still there, or if it comes back faster each time you run, that's a trend.
If across three runs the pain is improving or holding steady in the background, keep training and keep an eye on it. If it's getting worse, or showing up earlier in each run, you're not waiting it out. You're compounding it.
Common Spots That Usually Warrant a Visit
A few specific pain patterns come up repeatedly in runners, and most of them respond well to treatment if you catch them early. Left alone, they tend to turn into time off.
| Where It Hurts | What It Often Is |
|---|---|
| Front of shin | Shin splints or early stress reaction. Volume problem. |
| Back of heel / Achilles | Achilles tendinopathy. Loves load, not rest. |
| Outside of knee | IT band syndrome. Hip strength and cadence issue. |
| Front of knee | Patellofemoral pain. Quad and glute control issue. |
| Inside of knee | Medial joint or meniscal irritation. Worth a proper look. |
| Heel / arch | Plantar fasciitis. Slow build, treatable early. |
| Hip (groin or deep) | Labral or flexor irritation. Often a mobility + strength fix. |
Most of these are load problems before they're anything else. That's the good news. Load problems are fixable with a smarter plan, not an MRI.
When to Book Sooner Rather Than Later
Three situations change the math and push this from "monitor it" to "get it looked at."
· You have a sharp, pinpoint pain on a bone (shin, hip, foot). Stress reactions don't negotiate.
· Pain is making you limp or noticeably change your gait.
· You're training for a race in the next 8 to 12 weeks and can't afford to lose time to guessing.
The last one is the under-discussed reason most runners come in. Not because the pain is catastrophic, but because the timeline doesn't leave room to wait and see. A 45-minute assessment tells you what the problem is and whether your plan needs adjusting. That's the difference between running your race and skipping it.
What We Actually Do in a Running Assessment
A Running Assessment at PRT is built for this exact decision. 45 minutes, 1-on-1. It's not just a treatment. It's a full look at how you move and how you've been training, so we can tell you what's going on and what to do about it.
- Video gait analysis on the treadmill. We look at cadence, foot strike, hip drop, and where your form breaks down under fatigue.
- Strength and mobility testing on the specific areas load running: hips, calves, feet, trunk.
- Load history review. What have you been running, at what pace, on what surfaces, in what shoes.
- A plan. Either treatment if there's a tissue issue, or a smarter loading plan if the problem is training design.
The Bottom Line
Most runners wait too long. Not because they're reckless, but because the pain feels minor and they don't want to pull the emergency brake on a training block. By the time it's obviously a problem, the fix takes longer and costs more weeks.
If your gut is telling you something is off, and you've read this far, you probably already know. Book the assessment. Worst case, we tell you you're fine and give you a plan to keep training. Best case, we catch it before it costs you a season.