Common Ankle Injuries in Runners injuries

...and How to Keep Them from Derailing Your Training)

If you’re a runner, your ankles are doing a lot of work for a relatively small joint. Every step requires them to absorb impact, adapt to the ground, store and release energy, and keep you upright when fatigue sets in. It’s no surprise that ankle injuries are one of the most common reasons runners end up sidelined.

Let’s break down the most common ankle injuries runners deal with, what causes them, how to treat them, and—most importantly—how to prevent them from happening in the first place.

1. Lateral Ankle Sprain (a.k.a. “I Rolled My Ankle”)

What it is: A lateral ankle sprain happens when the foot rolls inward, overstretching or tearing the ligaments on the outside of the ankle (most commonly the ATFL).

Common causes:

• Uneven surfaces or trail running

• Fatigue late in long runs or races

• Poor ankle strength or proprioception

• Previous ankle sprains (big risk factor)

Symptoms:

• Swelling and bruising on the outside of the ankle

• Pain with walking or running

• Feeling unstable or “wobbly”

Treatment:

• Short-term rest and load modification

• Swelling management 

• Progressive rehab focusing on strength, mobility, and balance

• Avoiding the mistake of returning to running too soon

Prevention tips:

• Single-leg strength work (calf raises, split squats, step-downs)

• Balance training (especially on fatigued days)

• Gradual return to trail or uneven terrain running

2. Achilles Tendinopathy

What it is: An overuse injury of the Achilles tendon caused by repetitive loading without adequate recovery. This is not an inflammatory issue—it’s a tissue overload problem.

Common causes:

• Sudden increases in mileage or intensity

• Speed work and hill workouts

• Limited ankle dorsiflexion

• Weak or fatigued calf muscles

Symptoms:

• Pain or stiffness in the Achilles, especially in the morning

• Symptoms that warm up during a run but worsen afterward

• Tenderness or thickening of the tendon

Treatment:

• Activity modification (not always total rest)

• Progressive calf strengthening / loading 

• Addressing training errors and running mechanics

Prevention tips:

• Consistent calf strength work year-round

• Gradual changes in training volume and speed

• Avoiding abrupt shoe changes, especially to lower-drop shoes

3. Posterior Tibial Tendon Dysfunction (PTTD)

What it is: The posterior tibialis muscle helps support the arch and control foot pronation. Overloading this tendon can lead to pain along the inside of the ankle and foot.

Common causes:

• High training volume

• Excessive pronation without adequate strength

• Weak foot and ankle stabilizers

Symptoms:

• Pain along the inside of the ankle

• Arch fatigue or collapse during runs

• Difficulty with single-leg heel raises

Treatment:

• Reducing load while symptoms calm down

• Strengthening the posterior tibialis and intrinsic foot muscles

• Addressing proximal strength (hips and trunk)

Prevention tips:

• Foot and ankle strength work (short foot exercises, controlled heel raises)

• Varying running surfaces and directions

• Managing weekly mileage 

4. Peroneal Tendinopathy

What it is: Irritation of the tendons that run along the outside of the ankle and help stabilize against excessive inversion.

Common causes:

• Repeated ankle sprains

• Running on slanted or uneven surfaces

• Weak lateral ankle stabilizers

Symptoms:

• Pain or swelling along the outside of the ankle

• Discomfort during push-off

• Feeling of instability

Treatment:

• Load management

• Progressive strengthening of the peroneals

• Improving ankle control and balance

Prevention tips:

• Lateral movement and stability exercises

• Single-leg balance with rotation or reach

• Not ignoring “minor” ankle tweaks

5. Ankle Impingement (Anterior or Posterior)

What it is: A pinching of soft tissue or bone in the front or back of the ankle, often aggravated during repetitive dorsiflexion or plantarflexion.

Common causes:

• Limited ankle mobility

• Repetitive uphill or downhill running

• Previous ankle injuries

Symptoms:

• Sharp pain at the front or back of the ankle

• Pain during toe-off or hill running

• Stiffness that doesn’t fully warm up

Treatment:

• Improving ankle mobility where appropriate

• Modifying training terrain

• Addressing strength and movement limitations

Prevention tips:

• Regular ankle mobility work

• Gradual exposure to hills and speed

• Early intervention when stiffness appears

How to Prevent Ankle Injuries as a Runner

The biggest mistake runners make? Only paying attention to the ankle after it hurts or waiting too long to seek help.

Key prevention strategies:

• Progressive training: Avoid sudden jumps in mileage or intensity

• Strength training: Ankles need strength, not just mobility

• Single-leg work: Running is a series of single-leg hops

• Recovery: Sleep, fueling, and rest days matter more than you think

• Early rehab: Don’t wait until pain forces you to stop running

When to Seek Help

If ankle pain:

• Persists longer than 1–2 weeks

• Worsens despite reduced training

• Affects your running mechanics

• Keeps returning every training cycle

…it’s time to get evaluated. Early treatment almost always means a faster return to running.

Bottom line

Ankle injuries in runners are common—but they’re also highly preventable with smart training, consistent strength work, and early intervention. Your ankles are resilient when trained well. Treat them like the high-performance joints they are.

If you’re dealing with ankle pain and not sure where to start, working with a running-savvy physical therapist can help you stay on the road (or trail) and out of the injury cycle.