Ankle Mobility Test (Weight-Bearing Lunge / Dorsiflexion)

Ever seen someone squat with their heels lifting off the ground, or their torso leaning forward excessively? Often the problem isn't the hips or technique — it's something much simpler: limited ankle dorsiflexion. The Weight-Bearing Lunge Test is the fastest and most reliable way to measure it.

It's a test every trainer or physio should have in their toolkit, because ankle dorsiflexion affects squatting, lunging, running, jumping, and landing.

What does this test measure?

It measures ankle dorsiflexion range of motion under load (with the foot planted and bearing weight), which closely resembles what happens during real sporting movements. It's typically expressed as the distance between the tip of the big toe and the wall when the knee touches the wall without the heel lifting, or as the angle of the tibia relative to vertical.

Limited dorsiflexion is associated with compensations such as heel lift during squats, excessive foot pronation, knee valgus, or lower-back overload from excessive trunk lean.

Equipment needed

• A wall
• Tape measure
• Optional: inclinometer or goniometer to measure in degrees
• Optional: tape to mark foot position

Test protocol

1. The subject stands barefoot in a lunge position, with one foot placed at an initial distance from the wall (for example, 10 cm from the toe)
2. Ask them to bring the knee toward the wall by flexing the ankle, keeping the heel in contact with the floor at all times
3. If the knee touches the wall without the heel lifting, move the foot further from the wall a few centimeters and repeat
4. If the heel lifts before the knee touches the wall, move the foot closer to the wall and repeat
5. Repeat this process to find the maximum distance at which the knee touches the wall while the heel stays planted
6. Measure and record that distance in cm (from the tip of the big toe to the wall)
7. Repeat on the other side and compare

Common mistakes

• Letting the heel lift slightly without noticing (invalidates the measurement)
• Not aligning the knee with the second toe during the movement (valgus or varus compensation)
• Measuring from a different reference point each repetition (always measure from the tip of the big toe)
• Not wearing matching footwear on both feet if tested with shoes on (better to test barefoot)

How to interpret the result

Knee-to-wall distance	Interpretation
> 10 cm (or > 35-40°)	Good dorsiflexion, no significant restriction
5-10 cm (approx. 30-35°)	Borderline dorsiflexion, monitor during deep squats or running
< 5 cm (< 30°)	Restricted dorsiflexion — high risk of compensation during squatting, lunging, and running
Asymmetry > 1.5 cm between sides	Possible imbalance that should be addressed before progressing to asymmetric loading

As a general reference, values between 10-12 cm (or 35-45° of ankle dorsiflexion) are usually considered adequate for most sporting movements.

Related tests

Ankle mobility directly affects the squat pattern and the entire lower-limb kinetic chain:

• Overhead Squat Assessment — limited dorsiflexion often shows up as heel lift or excessive trunk lean in this test
• Functional Mobility Test for Swimmers — if you work with sports that require leg drive, dorsiflexion is also relevant during the push-off phase

Track it over time

Ankle dorsiflexion is one of those measures that improves with targeted work (mobilizations, gastrocnemius/soleus stretching, loaded ankle work) and is worth retesting every few weeks. In Movalytics you can log the distance in cm for each side at every assessment, track progress over time, and see whether asymmetries between legs are being corrected.

Frequently asked questions

What's the difference between measuring in cm versus degrees? Measuring in cm (knee-to-wall distance) is more practical and requires no extra equipment, while measuring in degrees with an inclinometer gives a more standardized value that's comparable across studies. Both are valid as long as the same method is used consistently across assessments. Can limited ankle dorsiflexion be improved? Yes, in most cases it responds well to joint mobilizations, stretching of the posterior leg muscles, and progressive loading exercises within the dorsiflexion range (such as a loaded lunge itself). Why does this test matter if I mainly train upper body? Although it seems like a lower-body test, poor ankle dorsiflexion can create compensations that travel up the entire kinetic chain, affecting trunk posture during exercises like the overhead press or standing rows.