Clinical Examination and Treatment of the Foot and Ankle

Original Editor - Ewa Jaaczewska based on the course by Ari Kaplan

Top Contributors - Ewa Jaraczewska  

Introduction

Chronic foot and ankle pain often originates from a system that has learned to move around a restriction. When a joint stops gliding the way it should, a neighbouring joint takes over the job. Next, the plantar fascia, the Achilles, the medial arch, even the knee or hip start to experience deficiency as a result of doing work they were not built to do.

This reading page discusses assessing and treating the foot and ankle as a linked system where a restriction in one joint changes the load, timing, and strategy of every joint around it.

Assessment Principles for the Foot and Ankle

Gait Assessment

Observe Gait Cycle

Before you touch any foot and ankle structure, you must watch and listen, as the patient's gait can give away important information about any abnormality:

• Listen for loudness. A loud step usually means poor eccentric control and poor force absorption. The foot is landing rigid rather than decelerating through pronation.
• Observe rotation. Excessive external rotation of the limb, especially if it persists through swing phase, often reflects the body pre-organising itself to get around a dorsiflexion restriction. If the tibia cannot translate forward over a fixed talus, rotating the whole limb outward is a strategy to get the leg still forward.
• Notice the timing of supination. During healthy gait, the foot re-supinates promptly after midstance to create a rigid lever for push-off. A foot that stays pronated late into stance and only re-supinates at the last possible moment is struggling to organise stiffness on demand.
• Pay attention to the arch behaviour. Watch whether the medial arch actually flattens under load, or whether the appearance of "flattening" is really rearfoot eversion happening independently, with the midfoot never truly participating. These look similar from a distance but mean very different things for treatment.

None of these signs alone confirm a diagnosis, but together they build a hypothesis you can test manually.

Closed-chain functional testing for ankle dorsiflexion

Assess Movement Quality

A goniometer number tells you how far a joint moves, but does not tell you how easily it moves. Two joints can measure the same range and be clinically different. One joint can move smoothly from the beginning to the end range. The other resists from the very first degree and has to be forced. The joint that resists early is the one the patient's nervous system will avoid loading, regardless of what the tape measure says. When you assess dorsiflexion, you must pay as much attention to where resistance begins as to where motion ends. Early-onset resistance is often more clinically meaningful than a reduced end-range number.

During the assessment, closed-chain functional testing, such as knee-to-wall style dorsiflexion testing, matters more than isolated open-chain range.

Watch what the rest of the limb does as the ankle dorsiflexes under load:

• Does the knee track over the second toe, or does it drift into valgus?
• Does the foot stay straight, or does it externally rotate to find motion elsewhere?

A knee that collapses medially during closed-chain dorsiflexion testing is frequently not a hip problem. It is often the limb's way of "borrowing motion" from somewhere else because the ankle mortise will not give it up.

Assessing "true" closed-chain ankle dorsiflexion by blocking compensatory knee valgus

Recognise Restriction vs Compensation

When you find excess motion at a joint, for example, apparent subtalar eversion, you have to ask: "Is this joint genuinely hypermobile, or is it absorbing motion that a neighbouring joint will not produce?"

A simple technique is to test the joint's motion two ways:

1. Move the whole segment as a unit, for example, evert the whole rearfoot.
2. Anchor the proximal bone first (stabilise the talus), then isolate movement of the distal bone on it (glide the calcaneus on the talus alone).

If a joint looks hypermobile when tested as a whole segment but suddenly feels stiff or normal once you anchor the joint above it, it is NOT a hypermobile joint. It is a joint compensating for something proximal that cannot move. This distinction changes your entire treatment plan. Mobilising a "compensating" joint further will not fix the system; it can make the compensation worse and increase symptoms, because you are adding motion to a joint that is already over-contributing while ignoring the joint that's under-contributing.

Establish Restrictions Sequence

Think of the ankle and foot as a series of linked joints, each dependent on the one before it to move correctly:

Mortise (tibia/fibula around the talus) → Talocrural joint (talus gliding in the mortise) → Subtalar joint (calcaneus on talus) → Talonavicular joint (midfoot unlocking) → Forefoot

A restriction anywhere in this chain changes the mechanics of everything downstream. A classic pattern looks as follows:

• The mortise does not accommodate the talus, often due to a stiff medial malleolus limiting the necessary internal rotation of the tibia.
• Because the talus cannot glide posteriorly, dorsiflexion is blocked at its source.
• Rather than true subtalar pronation, the talus itself adducts to find some way to let the tibia move forward. This can look like pronation on video gait but is not happening through the joint you would expect. It is often referred to as "functional pronation."
• Because the subtalar joint is not truly cycling through pronation/supination, the calcaneus never aligns the midtarsal joint properly.
• The talonavicular joint cannot unlock because its alignment depends on the subtalar position that never happened.
• The result: a midfoot that feels "stiff" on palpation, but the stiffness may be secondary, not primary.

Clinical lesson: Do not automatically mobilise the joint that feels stiffest. If a stiff talonavicular joint is secondary to a proximal block, mobilising it aggressively risks flaring tissue that was never the true source of restriction, and the improvement will not hold once you stop treating it directly. Working proximal to distal, freeing the mortise and talocrural joint first, often restores motion further down the chain without ever touching it directly.

Connect Mechanics to Symptoms

Symptom location is a clue, not a final diagnosis.

Common ankle and foot movement patterns worth recognising are:

• Plantar fascia and calcaneal pain often reflect a foot that cannot create a stiff, efficient lever for push-off. If the bony architecture is not organising stiffness, soft tissue (fascia, intrinsic muscles) is recruited to do that job instead. Next, the overworked tissue becomes a painful tissue.
• Achilles symptoms frequently accompany a foot that deforms too much during propulsion. Pushing off a foot that is not rigid forces the calf-Achilles complex to work harder and through altered lines of pull.
• Intrinsic foot weakness or inability to perform a short-foot activation is not always a pure strength deficit. If tissue is inhibited by mechanical restriction or is already in a shortened, overactive state, it can look weak on testing without being weak in the traditional sense. Improving mechanics first, then reassessing motor control, avoids mislabeling inhibition as weakness.

Treatment Principles for the Foot and Ankle

Clinically, adopting personalised approaches allows for better detection of pathological motion patterns. Even when the total range of motion in the ankle joint complex appears unaffected, acute or chronic soft tissue or bone alterations can shift individual joint contributions. Evaluating these joint contributions and understanding function at an individual joint level can help monitor treatment and achieve sustainable rehabilitation outcomes.

Test, Treat, Retest

Never assume a single mobilisation technique worked or did not without re-checking function immediately afterwards. Two things to reassess after any intervention are:

1. Local motion — did the targeted joint actually gain range?
2. Downstream function — did closed-chain movement, gait quality, or a previously symptomatic motor task (like short-foot activation) change as a result?

Sometimes treating one joint unexpectedly frees up a joint you did not touch, because the chain was more interdependent than you initially mapped. You will only know this if you retest immediately, in the same session.

To learn more about mobilisation techiques, read this optional page: Principles of Joint Mobilisation.

Restoring joint range through manual therapy

Progress Treatment

Gaining new motion is a new risk. A joint that has not moved well in years, now suddenly given range, needs to be taught how to use that range under control before it is loaded aggressively. A reasonable progression sequence is as follow:

1. Mobility: restore joint range through manual therapy and guided home mobility work.
2. Motor control in open chain: teach the nervous system to actively access the new range without load.
3. Closed chain and single-leg control: translate that control into weight-bearing, then single-limb stability.
4. Midfoot/rearfoot dissociation: train the ability to move the forefoot independently of the rearfoot (e.g., controlled work on unstable surfaces), rather than compensating entirely at the rearfoot.
5. Progressive loading: calf raises and graded loading of the Achilles and plantar fascia once irritability has calmed and mechanics have improved.
6. Return to higher demand activity: running or sport-specific loading only after mobility, control, and strength milestones are met.

Skipping steps, especially jumping from a mobility gain straight to high-load activity, is a common reason patients flare shortly after a successful treatment session.

Manage Irritability and Expectations

If tissue is highly irritable, temporary offloading with, for example, taping, an orthotic, or activity modification, buys time for structures to calm down without asking the patient to "just push through it." You cannot build lasting mechanical change on top of tissue that is still acutely inflamed. Calming the system down is should be a prerequisite for it holding.

Equally important is preparing patients for expected flares with increased activity, especially early in care. A patient who understands that new motion means new demand on tissue that has not handled it in years is far more likely to communicate early and stay engaged, rather than assuming treatment failed.

Finally, treatment plans succeed or fail based on what a patient can realistically sustain. Home program volume should match real-world constraints, such as work schedule, family demands, competing priorities, rather than an idealised amount of exercise. A smaller program done consistently outperforms an ambitious one that's abandoned after a week.

Summary

Long-standing foot and ankle pain is rarely a single-structure problem. It is usually a story of one joint that stopped moving well, and a system that quietly rebuilt itself around that restriction. It often happens at the cost of soft tissue further down the chain. Effective assessment separates true joint restriction from compensatory motion, respects the sequence of the kinetic chain, and treats mechanics and tissue irritability as two sides of the same problem. Effective treatment follows a deliberate progression, mobility, then control, then load, while managing expectations around flares and matching the plan to what the patient can actually sustain. Applied consistently, this reasoning framework works whether you are seeing your patient with foot and ankle problem or your five-hundredth.

Resources

• Muscle Strengthening Exercises for the Foot and Ankle: A Scoping Review Exploring Adherence to Best Practice for Optimizing Musculoskeletal Health