When a beginner's squat feels stuck above parallel, "tight hips" is the usual suspect. Sometimes the hips are fine and the limit sits lower down: the ankle. This guide shows you a two-minute check you can do at home, and a moving model that shows what a stiff ankle does to the rest of your body when you squat.
When you squat, your knees travel forward over your toes while your heels stay on the floor. The joint that allows that is the ankle, and the movement is called dorsiflexion: the shin tipping forward over the foot. If the ankle runs out of range early, the knees can't travel as far. To stay balanced over your feet, something else has to give. Usually your chest folds forward, or your heels peel off the floor.
That doesn't mean a forward lean is wrong. Everybody leans a bit, and a longer thigh bone or a different hip shape changes how much. It does mean that if you feel pushed onto your toes, or your lower back does the work, ankle range is one of the first things worth checking.
Physios use a simple version of this, often called the weight-bearing lunge test. You can do it with a wall and a tape measure.
There is no pass mark to chase. Distances vary a lot from person to person with leg length and foot shape. What's useful is comparing left with right, and today with a few weeks from now. If one ankle is clearly stiffer than the other, or the test hurts or pinches at the front of the ankle, stop and have a physio look at it before you work on it.
The model below is a simplified side view. It uses average body proportions (a 40 cm shin, 45 cm thigh, 50 cm torso) and assumes the bar sits over the middle of your foot. It always uses all of the ankle range you give it. Move the sliders and watch the lean at the bottom.
The last box compares your setup with a stretchy ankle (15 cm) and flat feet. Notice two things. A stiff ankle costs you lean at every depth, and a small heel lift gives some of it back straight away. A raised heel works like borrowing ankle range: the shin can stand more upright while your foot stays supported. One study of squats with raised-heel weightlifting shoes found less forward trunk movement than in running shoes (Sato et al., 2012), though people did not squat lower.
If the two sides are similar and the number feels fine for you, the ankle is probably not what is holding you back. Look at stance width, toe angle and how you brace before you chase flexibility. If one ankle is clearly behind, or you can barely get a knee to the wall with the heel down, a few weeks of simple work usually pays off:
Be patient. Ankle range tends to change slowly, over weeks, and some of it comes from how the bones are shaped, which no stretch will change. Your goal is a squat that feels stable and strong for you, not a number on a tape measure.
If you have had an ankle sprain or fracture, ongoing pain in the ankle, knee or hip, or a joint that catches or gives way, get it checked by a doctor or physio before testing or stretching it. This guide is general information, not medical advice.
Check each ankle against the wall, compare the two sides, and note your numbers. Then use the model to see whether ankle range, a heel lift or simply a different stance is worth trying first. Retest in a fortnight.