Why Runners Develop Shin Splints

Understanding the Causes, Symptoms, and Treatment of Shin Pain

Few things are more frustrating for runners than being forced to cut a run short because of pain. One of the most common running-related injuries is shin splints, a condition that affects runners of all experience levels - from beginners training for their first 5K to experienced athletes increasing their mileage.

If you've ever felt aching, tenderness, or pain along the front or inside of your lower leg during or after a run, shin splints may be the culprit.

At Core Performance Physical Therapy, we help runners throughout Orange County identify the root cause of shin pain, recover safely, and return to running stronger than before.

What Are Shin Splints?

"Shin splints" is a common term used to describe medial tibial stress syndrome (MTSS), a condition characterized by pain along the inner border of the shinbone (tibia).

The condition develops when the muscles, tendons, and connective tissues attached to the tibia become irritated from repetitive stress.

Shin splints are considered an overuse injury, meaning they typically develop gradually over time rather than from a single traumatic event.

What Do Shin Splints Feel Like?

Symptoms often include:

• Aching pain along the inside of the shin
• Tenderness when touching the shinbone
• Discomfort during or after running
• Mild swelling in some cases
• Pain that improves with rest but returns during activity

In the early stages, symptoms may only appear during longer runs. If ignored, the pain can become more persistent and begin affecting daily activities.

Why Do Runners Develop Shin Splints?

Shin splints rarely occur because of one single factor. Instead, they are usually the result of multiple contributing factors that increase stress on the lower leg.

Training Too Much, Too Soon

One of the most common causes of shin splints is a sudden increase in training volume.

Examples include:

• Increasing weekly mileage too quickly
• Adding speed workouts
• Running more frequently than usual
• Returning to running after time off

When training loads increase faster than the body can adapt, tissues become overloaded and irritated.

Weakness in the Lower Body

Running places significant demands on the muscles of the hips, knees, ankles, and feet.

Weakness in areas such as the:

• Glutes
• Calves
• Core
• Hip stabilizers

can lead to inefficient movement patterns and increased stress on the shins.

Poor Running Mechanics

The way you run matters.

Certain movement patterns may increase loading on the lower leg, including:

• Excessive impact forces
• Poor shock absorption
• Overstriding
• Reduced hip control

A running assessment can often identify movement inefficiencies that contribute to recurring shin pain.

Limited Ankle Mobility

Ankle mobility plays an important role in running efficiency.

Restricted ankle motion can alter mechanics throughout the entire lower extremity and increase stress on the shin area.

Inadequate Recovery

Training adaptations occur during recovery, not during the workout itself.

Insufficient recovery between runs may contribute to tissue overload and increase the likelihood of developing shin splints.

Footwear Changes

Running shoes that are excessively worn or inappropriate for an individual's needs may contribute to changes in loading patterns and running mechanics.

While shoes are rarely the sole cause of shin splints, they can be one piece of the puzzle.

Are Shin Splints the Same as a Stress Fracture?

Not necessarily.

While shin splints and stress fractures can produce similar symptoms, they are different conditions.

Shin Splints

• Pain is often spread across a larger area.
• Symptoms may improve as the body warms up.
• Pain typically develops gradually.

Stress Fractures

• Pain is often more localized.
• Symptoms may worsen with continued activity.
• Tenderness is usually concentrated in a smaller area.

Because the two conditions can overlap, persistent shin pain should be evaluated by a healthcare professional.

How Physical Therapy Helps Shin Splints

Treating shin splints is about more than simply reducing pain.

The goal is to identify and address the factors contributing to the problem so it doesn't keep coming back.

Movement Assessment

A physical therapist can evaluate:

• Running mechanics
• Strength deficits
• Mobility limitations
• Balance and stability
• Training habits

Understanding the root cause helps guide treatment.

Strength Training

Targeted strengthening exercises may improve the body's ability to tolerate running demands.

Treatment often focuses on:

• Glute strength
• Calf strength
• Core stability
• Lower extremity control

Mobility Training

Improving mobility in the ankles, hips, and surrounding tissues may help optimize movement patterns and reduce unnecessary stress.

Load Management

One of the most important aspects of recovery is modifying training appropriately.

This may involve:

• Temporary mileage adjustments
• Activity modifications
• Gradual return-to-running plans

Recovery Strategies

Depending on the individual, recovery may also include:

• Manual therapy
• Compression therapy
• Recovery technology
• Exercise progression programs

Can Shin Splints Be Prevented?

While not every injury can be prevented, runners can reduce their risk by:

• Increasing mileage gradually
• Following structured training programs
• Prioritizing recovery
• Strength training regularly
• Addressing mobility limitations
• Monitoring training loads
• Seeking treatment early when symptoms develop

The sooner contributing factors are identified, the easier they are often to address.

When Should You See a Physical Therapist?

Consider scheduling an evaluation if:

• Shin pain is affecting your runs
• Symptoms continue to return
• Pain is worsening over time
• Running volume has decreased due to discomfort
• You are preparing for an upcoming race and want to stay healthy

Early intervention can often help prevent a minor issue from becoming a more significant setback.

Keep Running Strong With Core Performance Physical Therapy

Whether you're training for your first race or preparing for your next marathon, shin splints can quickly disrupt your progress.

At Core Performance Physical Therapy, we help runners throughout Orange County identify the true cause of shin pain, improve running mechanics, build strength, and return to training with confidence.

Schedule an Evaluation Today

If you're struggling with shin splints or recurring running injuries, contact Core Performance Physical Therapy today. Our team can help you recover, stay active, and get back to enjoying every mile.