Posterior Tibial Tendonitis: Symptoms, Treatment Protocol, and Recovery Timeline

Sharp pain along the inner side of your ankle that worsens with every mile.

A dull ache that climbs your shin after a few miles.

Tenderness when you press directly on the tendon just below the bony bump on the inside of your ankle.

If any of that sounds familiar, you may have posterior tibial tendon dysfunction, one of the most underestimated running injuries.

Unlike most soft tissue injuries, this one can permanently change the shape of your foot if you keep running through it.

The good news: catch it early, follow the right protocol, and full recovery is possible without surgery.

In this guide:

• How to self-test for posterior tibial tendon dysfunction in 60 seconds
• Why the injury worsens when you run through it, and what the 4 clinical stages mean for your treatment
• How long the healing timeline actually takes (10 to 16 weeks for most runners)
• The 4-step conservative protocol backed by clinical research
• What cross-training preserves your fitness while you recover

What Is the Posterior Tibial Tendon?

The posterior tibial tendon runs along the inside of your ankle, connecting the tibialis posterior muscle deep in your calf to the bones of your foot’s arch.

The tendon itself is no thicker than a pencil.

But its job is enormous.

Every time your foot hits the ground and pushes off, the posterior tibial tendon locks your ankle in place and holds your arch rigid under load.

Without it, your arch collapses inward, your ankle rolls, and everything upstream has to compensate.

In advanced posterior tibial tendon dysfunction, that arch collapse becomes permanent.

Think of your foot’s arch as a suspension bridge, and the posterior tibial tendon as the main cable holding tension.

Weaken that cable and the bridge sags.

What Are the Symptoms of Posterior Tibial Tendonitis?

The hallmark symptom is pain along the inner ankle and foot, sometimes extending a few inches up your shin.

There may be mild swelling, and the area will be sore to press directly on the tendon.

The most reliable way to identify this injury yourself is the single-leg heel raise test.

Stand on the affected leg with your knee straight.

Rise up onto the ball of your foot as high as you can, hold for a second, then lower slowly.

Pain or weakness along the inside of your ankle during that movement is the clearest at-home indicator of posterior tibial tendon dysfunction.

In more severe cases, you won’t be able to rise onto your forefoot at all.

Research has used the single-leg heel raise as an inclusion criterion in posterior tibial tendon dysfunction studies, reflecting how specifically it identifies the injury.

This test also helps rule out injuries with similar locations.

Medial tibial stress syndrome and stress fractures of the medial malleolus produce pain in the same region but don’t cause ankle weakness on the heel raise.

Can You Run With Posterior Tibial Tendonitis?

Running on a posterior tibial tendon that’s already damaged is what turns a manageable injury into a permanent one.

Here’s why.

Research has shown that the posterior tibial tendon has a zone of relative avascularity in the section wrapping around your medial malleolus.

Poor blood supply means slow healing.

Running adds new damage faster than a poorly-supplied tendon can repair it.

As the tendon weakens, your arch drops and your foot pronates more under load, which puts more stress on the tendon, which causes more damage.

That cycle compounds until, in severe cases, the arch collapses permanently.

The 4 Clinical Stages

Doctors classify posterior tibial tendon dysfunction in 4 progressive stages.

Your stage determines your treatment options.

Stage I: Tendon inflammation or microdamage, but no change in foot shape. Conservative treatment works well. This is where you want to catch it.

Stage II: The tendon begins to elongate and the arch gradually flattens. Most patients at this stage can no longer complete a single-leg heel raise. Conservative treatment is still possible but requires more intensive management, often with specialized ankle-foot orthoses.

Stages III and IV: Partial or complete tendon rupture with permanent foot deformity. Surgery is usually required.

The 4-step protocol below applies to Stage I. If you’re in Stage II or beyond, see a podiatrist or foot and ankle orthopedist before starting any rehab.

What Causes Posterior Tibial Tendonitis in Runners?

The most common cause is classic overuse: ramping mileage too fast or resuming training too quickly after time off.

Acute tears from a fall or sudden ankle roll are less common but do occur.

Runners with high arches carry some protection since the tendon doesn’t have to work as hard to maintain arch position.

Runners of every arch type still develop this injury.

A case-control analysis of 2,002 running injuries found posterior tibial tendon dysfunction to be relatively uncommon at rank 26, but among the most consequential when it does occur.

How Long Does Posterior Tibial Tendonitis Take to Heal?

Stage I cases treated consistently with the full protocol take 10 to 16 weeks from the start of rehab to return to running.

The two most comprehensive clinical studies on conservative treatment ran 10 to 12 weeks (Kulig et al., 2009) and 16 weeks (Alvarez et al., 2006), including an initial 2-week rest period.

Walking does not need to stop, but it should be minimized during the early weeks, especially on uneven surfaces.

Wear supportive shoes during all waking hours, including around the house, to reduce tendon load on every step.

The 10 to 16 week window assumes no setbacks.

Runners who continue any activity that loads the tendon during that period extend the timeline significantly.

Every clinical study that has successfully treated posterior tibial tendon dysfunction with conservative measures included arch support as a component of the protocol from day one.

The 4-Step Treatment Protocol for Runners

The research on conservative treatment points consistently to 4 components working together.

No single piece works in isolation.

Step 1 — Stop Running and Reduce Load

Stop running completely.

The posterior tibial tendon heals slowly because of poor blood supply to the section wrapping around your medial malleolus.

Running adds damage to a structure that can’t repair itself fast enough to keep pace.

Swimming and cycling are generally safe as long as they’re pain-free.

Aqua jogging is the best option for maintaining running fitness during this phase (more on that below).

Keep daily walking to a minimum, especially on uneven surfaces, and always in supportive shoes.

Step 2 — Support Your Arch With Footwear and Orthotics

Arch support reduces the mechanical demand on a tendon that can’t currently handle full load.

When your arch is propped up, the posterior tibial tendon doesn’t have to work as hard with every step.

One study in the conservative treatment literature asked patients to wear shoes and orthotics for at least 90% of waking hours, including barefoot time at home.

Walking barefoot on hard floors still stresses the tendon.

Wear your shoes from the moment you get up.

On custom versus over-the-counter: the comparison hasn’t been studied specifically for posterior tibial tendon dysfunction.

What the research does establish is that some arch support is clearly better than none.

Whether you need custom orthotics is a question for your podiatrist.

Step 3 — Stretch Your Calves Twice Daily

3 separate clinical studies that successfully treated posterior tibial tendon dysfunction each included a structured calf-stretching protocol.

The standard protocol:

• 3 sets of 30-second wall calf stretches with a straight knee (targets the gastrocnemius)
• 3 sets of 30-second stretches with a bent knee (targets the soleus)
• Done twice daily, on both legs
• Use an incline board if you have one

One important detail from the Kulig et al. 2009 USC study: do all your stretching in your shoes and orthotics.

The support changes the mechanics of the stretch in a way that’s relevant to how the tendon loads.

Step 4 — Progressive Tendon Strengthening

This is where the research gets specific, and where most informal rehab advice falls short.

The protocol has 2 phases.

Don’t move to Phase 2 until you’ve completed at least 3 weeks of Phase 1.

All exercises are done in shoes and orthotics. Stop if you feel significant pain.

Phase 1: Build Endurance (Weeks 1-3)

• Seated sole-to-sole: Sit with feet on the floor. Press the inside edges of your feet together and hold briefly, then release. Start with 4 sets of 25 reps daily, building over 2 weeks to 12 sets of 25, then to 300 continuous reps.
• Theraband dorsiflexion (200 reps, 1x/day): Loop a theraband around the top of your foot and anchor it in front. Pull your toes toward your shin against resistance. Progress to a stronger band when 200 reps feels easy.
• Theraband inversion, endurance (200 reps, 1x/day): Anchor the band at 45 degrees. Roll your foot inward against resistance. Keep a towel under your foot. All movement from the ankle only.
• Theraband eversion (200 reps, 1x/day): Same setup as inversion, but roll the foot outward.
• Theraband inversion, strength (3 sets of 15, 2x/day): Same inversion movement with the heaviest theraband you can control for 15 reps. Slow and controlled in both directions. Increase resistance as the tendon adapts.

Phase 2: Functional Loading (Week 4+)

• Single-leg heel raises: Stand on the affected leg, rise onto your forefoot, lower slowly. Start with a few reps and build progressively to 50 continuous reps. Use a wall lightly for balance only.
• Toe walking: Walk forward on your toes with heels fully off the ground. Start at 8-10 yards and build to 100 yards (91 meters).
• Balance board tapping: Stand on your affected leg on a balance board. Tap the board in each of 5 directions (forward, back, left diagonal, right diagonal, rotational), 20 taps per direction. Repeat in reverse for 2 full sets.

Plan on 3 months of daily work across both phases before attempting a return to running.

What Cross-Training Can You Do While You Recover?

Aqua jogging is the best option for this injury.

It closely mimics running mechanics with zero imp