Shin Splints in Runners: Causes and How to Fix Them

Your shins start aching about ten minutes into a run. It might fade once you warm up, or it might get worse and follow you home. Either way, you are now doing math on whether to skip tomorrow, and nobody enjoys that math.

Shin splints are one of the most common reasons runners stall out, especially after a quick ramp-up in mileage, speed work, or a switch to harder surfaces. The good news is that the cause is usually fixable. The less fun news is that the fix is rarely "just rest and stretch."

What shin splints usually are

"Shin splints" is a catch-all term for pain along the inner edge of the shinbone, usually the lower two-thirds. It generally reflects an irritated bone surface and the tissue around it responding to repeated load. Many clinicians call it medial tibial stress syndrome.

It often feels like:

• A dull, spread-out ache along the inside of the shin, not a single spot
• Pain at the start of a run that may ease, then return afterward
• Tenderness when you press along a stretch of the shin
• Soreness after hard days, especially on hills or hard surfaces

Pain from a different cause can look similar, which is why we do not assume. More on that below, because one version of shin pain needs a very different response.

Why shin pain when running happens

Your lower leg absorbs a lot of force. The shin and the muscles around it are built for that, but only up to what they are currently prepared for.

Common contributors include:

• A sudden jump in training. More miles, more days per week, or a new speed session all at once.
• Calf and foot capacity. If the calf and foot muscles fatigue early, more stress lands on the shin.
• Surface and shoe changes. New shoes, worn-out shoes, or a move from trails to pavement.
• Stride and cadence habits. Heavy heel landings or overstriding can add load for some runners.
• Limited ankle mobility or hip strength. The chain above and below the shin changes how force travels.
• Not enough recovery. Hard days stacked without easy ones between.

Most of these come back to the same idea. The training load went up faster than your tissues adapted. Your PT will work out which factors apply to you rather than blaming one thing.

What makes shin splints worse

• Running through increasing pain because "it warms up"
• Adding mileage and intensity in the same week
• Doing all your runs on hard surfaces
• Skipping strength work because it is boring
• Taking a full month off, then restarting at your old volume

That last one catches a lot of people. Rest can calm things down, but the shin is no more ready when you come back unless you built capacity during the break.

When shin pain needs a closer look

Here is the important distinction. Pain that persists at rest, wakes you at night, or is focused on one spot on the bone may be a stress injury rather than shin splints, and it needs evaluation before you run again. Pressing on a single point and getting sharp, pinpoint pain is a reason to stop running and get it checked.

Also seek prompt evaluation for sharp or worsening pain, numbness or tingling, swelling, pain at night, fever, or inability to bear weight. If any of those fit, do not try to run it off.

Shin splints treatment: what a strength-based PT does

Effective shin splints treatment manages load while building the capacity your lower leg is missing. At Complex, physical therapy starts with a full assessment of your running, strength, and mobility, then builds a plan around your schedule and goals.

That usually includes:

• Load adjustment. Reducing running volume or intensity enough to calm the shin, while keeping you moving where possible.
• Calf, foot, and hip strengthening. Progressive loading, not a few token reps.
• Ankle and big toe mobility work. So force is shared properly through the leg.
• Running mechanics and cadence review. Small adjustments, only where they make sense.
• A staged return to running. Run-walk intervals, then longer runs, based on how the shin responds.

We treat rehab like training with a constraint. If you want a structured way to build the foundation, our performance training pairs well with a running plan.

Exercises to start with

These are general starting points. Stay in a comfortable effort range, and stop if pain sharpens.

Straight-knee calf raises. Rise onto the balls of the feet, pause, lower over three seconds. Try 3 sets of 10 to 15, progressing to a single leg.

Bent-knee calf raises. Same movement with the knee bent to target the deeper calf. Try 3 sets of 10 to 15.

Tibialis raises. Stand with your back against a wall, heels a foot in front, then lift the toes toward your shins and lower slowly. Try 2 to 3 sets of 12 to 20.

Single-leg balance. Stand on one leg for 30 seconds, 3 times each side. Make it harder by closing your eyes or standing on a pillow.

Side-lying hip abduction or lateral band walks. Try 2 sets of 10 to 15 each side to build hip control.

Do strength work two to three days per week, spaced out from your hardest runs.

Simple self-management

• Swap one or two runs for low-impact work such as cycling or swimming while symptoms settle
• Run on a softer surface when possible and avoid hills temporarily
• Increase weekly volume gradually, and keep easy days easy
• Replace running shoes that are clearly worn out
• Keep strength work in the weekly schedule

If you are juggling a bigger race, our guide on when to modify versus stop marathon training will help you decide what is worth adjusting.

Frequently asked questions

Can I keep running with shin splints?

It depends on how the pain behaves. Mild discomfort that settles quickly may allow reduced, controlled running, while pain that builds or lingers means you should cut back and get assessed. If you have pinpoint tenderness on the bone or pain at rest, stop running and get evaluated first.

How long do shin splints last?

There is no single timeline, and it varies with how irritated the shin is and how quickly your training changes. Your PT can give you a realistic outlook after seeing your running history and examining your leg.

Are compression sleeves or new shoes enough?

They may feel helpful for some runners, but they do not build the strength or fix the training load that caused the problem. Treat them as optional extras, not the plan.

If your shins keep interrupting your runs, book an evaluation at our South Miami or Wynwood clinic. We will find out what the pain actually is and help you get back to running with a plan, not a hope.