Ankle tests: the complete guide to assessing sprains, instability, and injuries (with tables)

The ankle is one of the most commonly injured joints in sports and everyday life: one bad landing, a sharp twist, or a misstep on the stairs, and you've got a sprain. The problem isn't just the initial sprain — it's what comes after. Many people carry chronic ankle instability for years because no one did a complete assessment after the first injury.

In this guide we cover the 10 most relevant and most-searched ankle and foot tests, designed so that in a single assessment you can distinguish between a simple sprain, a more serious ligament injury, a syndesmosis problem, plantar fasciitis, or a motor control deficit that predisposes someone to re-injury.

Why do a complete ankle assessment?

A well-done ankle assessment lets you:

1. Differentiate injured structures (lateral ligaments, syndesmosis, Achilles tendon, plantar fascia, nerves) so you don't treat everything as "just another sprain"
2. Detect functional instability that isn't visible at first glance but explains why the ankle "gives way" on uneven ground or after returning to sport
3. Decide whether a referral is needed (suspected fracture, complete Achilles rupture, unstable syndesmosis) or whether you can continue with the rehab plan
4. Justify training progression: from the protection phase to full loading and return to sport

As always, this doesn't replace diagnostic imaging when fracture or complete rupture is suspected, but it gives you a fast, objective basis for day-to-day decisions.

The 10 ankle and foot tests you'll need

Test	What it detects	When to use it
Tinel's test at the foot/ankle	Nerve entrapment or irritation (e.g., tarsal tunnel)	When there's tingling, electric-shock sensations, or neuropathic pain in the foot
Thompson test	Achilles tendon rupture	After a "pop" in the calf with pain and weak plantar flexion
Squeeze test (syndesmosis)	Tibiofibular syndesmosis injury	"High-energy" sprains with pain above the ankle, not just lateral
Windlass test	Plantar fasciitis	Heel or arch pain, especially when standing up after sitting
Mulder's test	Morton's neuroma	Pain or a "click" between the toes, sensation of a pebble in the shoe
Talar Tilt test	Laxity of the posterior talofibular and calcaneofibular ligaments	Recurrent sprains or suspected mechanical instability
Anterior drawer test of the ankle	Laxity of the anterior talofibular ligament	After a lateral sprain, to assess the degree of ligament involvement
External compression test (Kleiger)	Deltoid ligament and/or syndesmosis injury	Eversion sprains or atypical external rotation mechanisms
Ankle motor control test (modified SEBT)	Dynamic balance and neuromuscular control	Rehab phase, before clearance to return to sport
Weight-bearing lunge test	Ankle dorsiflexion mobility	When there's stiffness, a "short ankle" feeling, or limitation in the squat

As you can see, these tests cover three areas: structures (ligaments, tendon, syndesmosis, fascia, nerve), mechanical instability, and function (mobility and motor control). A complete assessment covers all three.

How to choose the right test for your situation

• Recent acute injury (first 72 hours): start by ruling out anything serious. If there was an audible "pop" and significant weakness, try the Thompson test. If the pain extends above the ankle or the mechanism was "high-energy" (a fall, severe twisting), assess with the squeeze test and the Kleiger test.
• Typical lateral sprain ("I rolled my ankle inward"): the anterior drawer and talar tilt tests give you information about the degree of ligament laxity, useful for deciding protection timelines.
• Heel or plantar pain with no clear traumatic history: here the Windlass test (plantar fascia) takes center stage, and if there's discomfort between the toes, the Mulder test.
• Tingling, burning, or electric-shock sensations: don't rule out a nerve component — the Tinel test can point toward an entrapment.
• Stiffness or a "short ankle" feeling when squatting or climbing stairs: the weight-bearing lunge test is a simple way to measure available dorsiflexion.
• Before returning to sport after a sprain: don't stop at the structural level. The modified SEBT tells you whether motor control and dynamic balance are up to the demands of the sport.
• Recurrent sprains: combine talar tilt + anterior drawer + SEBT. Often, "lifelong" instability is a mix of residual ligament laxity and a motor control deficit that was never addressed.

The general rule: first rule out anything urgent, then assess the specific structure, and finally the functional component (mobility and motor control) — which is what really determines whether someone is ready to train again without fear of re-injury.

From assessment to rehab plan

Doing these tests once is useful, but the real value comes when you repeat them throughout the process: has talar tilt laxity decreased? has the SEBT score improved? is there now enough dorsiflexion on the lunge test?

With Movalytics you can log each of these ankle tests, compare results from session to session, and visually track your client's or patient's progress, without digging through loose sheets of paper or folders full of photos. That way, progression decisions (when to add load, when to clear someone for sport) are based on data, not just "gut feeling."

Frequently asked questions

How soon after a sprain can I do these tests? Ligament stability tests (anterior drawer, talar tilt, squeeze, Kleiger) are usually more reliable after the first few days, once acute swelling and pain have decreased enough to allow examination without too much guarding. In the very acute phase, the main goal is to rule out fracture and complete rupture (Thompson test). Does a negative test rule out injury 100%? No. No single test has perfect sensitivity and specificity. That's why it's recommended to combine several tests with the clinical history and, if there's reasonable doubt (suspected fracture, point bone tenderness, inability to bear weight), refer for diagnostic imaging. Why does someone with a "fully healed" sprain still feel an unstable ankle? This is very common. Chronic ankle instability combines two components: mechanical laxity (the ligament ended up slightly longer or weaker) and a motor control deficit (the nervous system lost precision in reacting to uneven surfaces). The first is assessed with the talar tilt or anterior drawer; the second, with the modified SEBT. Often only the first is addressed, and the second gets overlooked. Are these tests useful for runners and athletes with no prior injury? Yes. The weight-bearing lunge test and the modified SEBT are excellent as preventive screens: limited dorsiflexion or poor motor control are known risk factors for sprains and other injuries down the lower kinetic chain (including the knee). Do I need special equipment for these tests? Most can be done with no equipment at all, or with very basic items (tape measure, wall, step). The most important thing isn't the equipment — it's standardization: always performing the test the same way so you can compare results over time, which Movalytics makes easy by keeping everything logged and organized by date.