How to Know If You Have a Stress Fracture
- Felicia Sciortino
- 4 days ago
- 3 min read
If you’re a runner ramping your mileage back up after a lower-volume winter, this is prime time for bone stress injuries to sneak in. Every year around this time, I start seeing more athletes with that same concern: “Is this just shin splints… or something worse?”
Let’s break down how to tell.
What Is a Stress Fracture (and Why Do Runners Get Them)?
A stress fracture is part of a spectrum called a bone stress injury (BSI). It happens when your bone can’t keep up with the repetitive load you’re putting on it.
Bone is living tissue—it adapts to stress. But when:
Training volume or intensity increases too quickly
Recovery (sleep, nutrition, fueling) isn’t adequate
Or there’s a mismatch between load and capacity
…the bone starts to break down faster than it can rebuild.
That’s when symptoms show up.
Common Signs of a Stress Fracture in Runners
Here’s what tends to stand out:
1. Pain that starts subtle—but progresses
Early: discomfort at the end of a run
Then: pain during the run
Later: pain with walking or even at rest
This progression is a big red flag.
2. Pain that becomes very localized
Runners will often say:
“I can point to it with one finger.”
That’s important. Stress fractures tend to be highly focal.
3. Pain that lingers after activity
Unlike more mild overuse injuries, symptoms don’t just disappear once you stop running.
4. Decreased performance or altered gait
You may start subconsciously offloading the area—or notice your pace dropping without a clear reason.
The Hop Test: Helpful, But Not Perfect
The single-leg hop test is commonly used as a quick screen.
Stand on the affected leg
Perform small, controlled hops
What to look for:
Sharp, localized pain = concerning for bone stress injury
Inability or hesitation to hop = also concerning
But here’s the nuance:
A positive hop test doesn’t automatically mean stress fracture—and a negative one doesn’t completely rule it out.
I use it as one piece of the puzzle, not the whole answer.
Tenderness to Palpation: The Size Matters
This is one of my favorite clinical differentiators.
Stress Fracture / Bone Stress Injury:
Very specific, pinpoint tenderness
Typically < 2–3 cm in size (a dime)
Feels deep and sharp
Medial Tibial Stress Syndrome (MTSS / “shin splints”):
More diffuse tenderness
Usually > 5 cm along the inner shin (a credit card)
Achy, spread-out discomfort
If you can trace the pain along a longer stretch of bone, it’s more likely MTSS.If it’s one exact spot that makes you wince? That’s when I get more concerned.
Shin Splints vs. Tibial Bone Stress Injury
This is where a lot of runners get confused.
Medial Tibial Stress Syndrome (MTSS)
Diffuse pain along the inner shin
Often worse at the start of runs, then warms up
Improves with rest
Lower risk overall
Tibial Bone Stress Injury
Focal, pinpoint pain
Progressively worsens with activity
May hurt with walking or daily life
Higher risk if ignored
Think of MTSS as a warning sign, and bone stress injury as what can happen if the load keeps exceeding your capacity.
High-Risk Stress Fracture Sites You Shouldn’t Ignore
Some bones don’t tolerate stress injuries well and require more caution:
Anterior tibia (front of the shin)
Femoral neck (hip)
Navicular (midfoot)
Fifth metatarsal (outer foot)
Pain in these areas—especially if it’s focal and worsening—deserves prompt evaluation.
Why This Happens Right Now (Spring Build Season)
This time of year is the perfect storm:
Mileage is increasing
Workouts are getting faster or longer
You may still be rebuilding strength from a lower winter base
Even if your cardio feels ready, your bone and tissue capacity may lag behind.
When to Get It Checked Out
You don’t need to panic at every ache—but you also don’t want to push through the wrong kind of pain.
Consider getting evaluated if:
Pain is getting worse instead of better
It’s localized and sharp
You have pain with walking or hopping
You’ve had symptoms for >1–2 weeks without improvement
Early intervention can be the difference between a short deload… and a long time off.
The Bottom Line
Not all shin pain is a stress fracture—but some of it is.
The key things I want you to remember:
Focal pain + worsening trend = pay attention
Diffuse pain that warms up = more likely shin splints
The hop test and palpation help—but context matters
If something feels off, trust that instinct. Runners are very good at pushing through things—we just want to make sure you’re pushing through the right ones.
Want me to take a look? Sign up for your evaluation here.
Great read!