The ankle is the first joint that meets the ground, and its mobility shapes everything above it. When ankle dorsiflexion, the ability to bring the knee forward over the toes, is limited, the body compensates: heels lift in a squat, knees collapse inward, and on the trail, each uneven landing becomes harder to absorb. The result is shallower squats, less stable trail running, and extra stress on knees and hips that were never meant to pick up the ankle's slack.

The fix is straightforward and does not require special equipment. Ten minutes of targeted ankle work, done several times a week, usually produces noticeable changes within a month. The key is consistency and addressing both the joint itself and the calf muscles that restrict it.

Start with a simple knee-to-wall test. Face a wall in a half-kneeling position, toes about ten centimetres from the wall, and try to touch your front knee to the wall without your heel lifting. Move the foot back gradually until you find the furthest distance where the knee still touches with the heel down. That distance is your baseline; retest every few weeks to track progress, and compare left and right, because a large difference between sides is worth extra attention on the stiffer ankle.

If one side is dramatically worse, or if you feel pinching at the front of the ankle during the test, keep the work gentle and consider getting the ankle checked. Pain at the front of the joint can indicate an impingement that stretching alone will not fix.

Begin with calf soft-tissue work: two minutes of slow foam rolling or ball rolling on each calf, pausing on tender spots and breathing through them. Tight calves are the most common limiter of dorsiflexion, and releasing them first makes the joint work that follows far more effective. Follow with a straight-knee calf stretch against a wall, thirty seconds per side, and then a bent-knee version, which targets the deeper soleus muscle that the straight-knee stretch misses.

Next, work the joint directly with a banded ankle mobilisation: loop a resistance band around the front of the ankle, anchor it behind you, and drive the knee forward over the toes for ten slow reps per side. Finish with control work: slow single-leg calf raises with a pause at the top, and balance practice on one foot with eyes open, then eyes closed, for thirty seconds per side. Mobility without control is useless on a trail, where every step is a single-leg balance challenge.

Do this routine three to four times per week, ideally after training when tissues are warm, or as a standalone ten-minute session on rest days. Pair it with your squat sessions by doing the knee-to-wall mobilisation as part of your warm-up, and expect squat depth to improve gradually rather than overnight.

For trail runners, add the routine on the day before a long run so the ankles are prepared, and practise landing on uneven ground deliberately: short trail segments where you focus on letting the ankle adapt rather than locking it rigid. Progress gradually, stop if any drill causes sharp pain, and remember that the goal is not maximum flexibility but enough mobility, owned with strength, to squat deep and run uneven ground with confidence.

Mobility gains fade quickly if the new range is never loaded, so pair this routine with ankle strengthening. Single-leg calf raises on a step, lowering slowly over three seconds, build the eccentric strength that controls descents on the trail and keeps the heel grounded in a squat. Tibialis raises, lifting the toes toward the shin against a wall or with a band, strengthen the front of the shin and balance the calf work. Add short barefoot balance drills on a wobble board or folded towel, progressing from eyes open to eyes closed as control improves. Two short strength sessions per week, alongside the mobility routine, give you ankles that are not just flexible but capable, which is the combination that actually protects knees and improves squat depth over the long term.