Free app · iPhone and Android

Clubfoot Forward is on the App Store and Google Play. For parents in the middle of treatment and adults who never stopped having it. Free, works with no signal, and stays on your phone.

What the app does

App Store →
Google Play →
Bilateral Clubfoot Research & Resources

What Is the Common Cause of Limited Ankle Dorsiflexion?

Heath

Nine ankles, one complaint, different reasons

Dorsiflexion is the ankle bending so the shin travels forward over the foot. When it is limited, the knee cannot get past the toes, the heel lifts early, and load moves somewhere it was not designed for. Several quite different things produce that same restriction, and they respond to completely different treatment. So the useful question is never how much movement, but what is stopping it.5

Written by Heath, who has lived it: casts from birth, a fusion at sixteen, the US Army, and distance running.

What is actually happening at the ankle?

Pick everything that applies. The single most informative item is what changes when the knee is bent, because that one test separates the two commonest causes from each other.

What you notice

1
Gastrocnemius tightness
The calf has two layers. Gastrocnemius crosses the knee as well as the ankle, so bending the knee takes it out of the equation. If dorsiflexion is poor with the leg straight and clearly better with the knee bent, this muscle is the restriction. And it is the most common finding by some distance, in clubfoot and in ankles that never had anything wrong with them.
It is the one cause on this list that reliably responds to stretching alone, which makes distinguishing it worth the thirty seconds it takes.
Commonest
2
Soleus or whole triceps surae contracture
Soleus sits underneath gastrocnemius and does not cross the knee, so bending the knee changes nothing. Restriction that is identical bent and straight points here, or to the Achilles tendon they share. This is the pattern most often seen in a foot that was treated for clubfoot, where the whole posterior structure is shorter, not one muscle being tight.
Stretching helps far less than people expect, because the tissue is short and not tight. Knowing that early saves months of frustration.
Structural
3
Anterior bony impingement
Bone spurs on the front of the tibia and the neck of the talus meet before the joint runs out of soft-tissue range. The end feel is abrupt and hard, not elastic, the pinch is felt at the front of the ankle and not the back, and no amount of stretching moves it, because nothing soft is in the way.
The only cause here where stretching is not merely useless but actively aggravating, since it drives the two surfaces together.
Hard block
4
Residual clubfoot deformity
A treated clubfoot commonly holds some equinus. The foot sitting in a degree of downward pointing that the ankle never gets back. It is usually a combination: a short posterior structure, a capsule that has adapted, and often a talus whose shape was altered before treatment began. Several restrictions stacked, rather than one.
Explains why an ankle can measure badly and function well: the rest of the foot has spent decades compensating for it.
Congenital
5
Post-immobilization stiffness
Any ankle held still for weeks loses range, through capsular tightening and adhesion instead of through anything shortening. It is the most reversible entry on this list and the one most reliably recovered with graded movement. But the window matters, and range regained in the first months comes back far more easily than range chased a year later.
Genuinely fixable, and the cause most often left too long because it is assumed to resolve on its own.
Reversible
6
Ankle arthritis
Worn cartilage, a joint that is stiffest in the morning and after sitting, and range that varies from day to day with how much the ankle has been asked to do. In clubfoot this is usually post-traumatic in character, not age-related. A joint that has been loaded abnormally for decades behaves like one that was injured, not one that got old.
The morning pattern is the giveaway, and it separates arthritis from every muscular cause above.
Joint surface
7
Swelling inside the joint
Fluid takes up space, and a joint holding fluid has less room to close at the front. Range that fluctuates over days or weeks, worsens after activity, and improves when the ankle settles is more likely to be this than anything permanent. It is easy to mistake for developing stiffness because it feels the same from inside.
Temporary and treatable, but only if it is recognized as swelling and not accepted as decline.
Fluctuating
8
Increased muscle tone
In neurological conditions the calf resists being lengthened instead of simply being short: push faster and it pushes back harder, which is the distinguishing feature. Over years that resistance produces genuine shortening as well, so the two problems end up layered. Treatment is aimed at tone first, which is a different specialty from everything above.
Needs identifying instead of stretching, because stretching a spastic muscle without addressing tone achieves very little.
Neurological
9
Previous fusion
Where joints have been deliberately fused, the movement they used to contribute is gone by design. A triple arthrodesis fuses the joints below the ankle and not the ankle itself, so true dorsiflexion may be preserved. But the foot as a whole has less give, and the ankle is left doing all of the work alone. An ankle fusion removes dorsiflexion outright.
Not a problem to be solved but a fact to be worked around, and worth knowing so effort goes somewhere useful.
By design

Nine causes, in rough order of how often they turn out to be the explanation. Pick what you are noticing and the list re-ranks.

The test that does most of the sorting

Clinicians use a straightforward comparison, named after the surgeon Silfversköld, and it takes about half a minute. Dorsiflexion is measured with the knee straight, then measured again with the knee bent to ninety degrees. Because gastrocnemius crosses the knee and soleus does not, bending the knee slackens one and leaves the other exactly as it was.67

If range improves substantially with the knee bent, gastrocnemius is the restriction. If it does not change, the limitation is in soleus, the Achilles, the capsule or the bone. That single distinction sorts the two commonest causes, and it points at genuinely different treatments, which is why it is worth asking for by name instead of accepting “tight calves” as an assessment.

Better with the knee bentGastrocnemius. Responds to stretching, and sometimes to a targeted release.
No change either waySoleus, Achilles, capsule or bone. Stretching does much less.
Hard, abrupt end feelSuggests bone and not soft tissue, whatever the knee is doing.

Two ankles can measure the same ten degrees and need opposite treatment. The number is not the finding.

Why it matters upstream

An ankle that cannot let the shin travel forward has to get that movement from somewhere, and the body is obliging about finding substitutes. The commonest is the arch, which collapses further to let the leg advance. The next is the knee, which stays bent through stance and loads the front of the joint for longer than it should. The hip and lower back take what remains.

This is why limited dorsiflexion appears in conversations about knee pain, plantar heel pain and Achilles problems that seem unrelated to the ankle. It is also why treating the site of the symptom sometimes achieves nothing: the tissue that hurts is the one absorbing the deficit, not the one causing it.

The knee connection → How to recognize it → Signs your range is limited →

People also ask

Limited ankle dorsiflexion

What causes limited ankle dorsiflexion?
Most often tightness in gastrocnemius or shortening of soleus and the Achilles. Other causes include bone spurs blocking the front of the joint, residual clubfoot deformity, stiffness after a cast, arthritis, joint swelling, increased muscle tone and previous fusion.
How do I tell muscle tightness from a bone block?
By where and how it stops. A muscular restriction is felt as a stretch up the calf with a springy end point; a bone block is a hard, abrupt pinch at the front of the ankle that stretching does not change and can aggravate.
What is the Silfverskiöld test?
Measuring dorsiflexion with the knee straight and again with it bent. Gastrocnemius crosses the knee and soleus does not, so a clear improvement with the knee bent identifies gastrocnemius as the restriction.
Can stretching fix it?
It helps genuine gastrocnemius tightness and does much less for a short Achilles, a stiff capsule or a bony block. That is the practical reason to identify the cause before committing to months of stretching.
Why does clubfoot limit dorsiflexion?
Usually several restrictions together: a shortened posterior structure, an adapted joint capsule, and often an altered talus shape. That combination is why the limitation persists after successful treatment instead of being tightness that can be stretched out.
Does limited dorsiflexion cause problems elsewhere?
Frequently. The movement has to be found somewhere, so the arch, the knee, the hip and the lower back absorb it. That is why the painful tissue is often not the restricted one.

Sources

Where this comes from

1 The Silfverskiöld test and gastrocnemius contractureFoot & Ankle literature, PubMed Central 2 Achilles tendon and calf tightnessAAOS OrthoInfo 3 Arthritis of the foot and ankleAAOS OrthoInfo 4 Diagnosis and Treatment of Idiopathic Congenital ClubfootPediatrics, 2022 5 Effects of peak ankle dorsiflexion angle on lower limb biomechanicsPMC 6 Subtalar joint position during gastrocnemius stretchingPMC 7 Reliability of the weight-bearing lunge testManual Therapy, 2015

Keep going

Related

What the limit costs →How the deficit is paid for elsewhere. Running with it →The same restriction under load. What actually helps →Where effort is and is not worth spending.

Compiled by Heath, founder of Clubfoot Forward, an adult with bilateral clubfoot. A general account of why an ankle stops moving, written to make an examination more useful and not to replace one; distinguishing these causes reliably requires hands on the joint. Not medical advice. Reviewed September 2026. See the editorial policy.

Hi, I’m Heath

Related Posts

Leave a Reply

Your email address will not be published. Required fields are marked *

We use cookies to improve your experience on our website