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Trail running involves covering unstable terrain. During a race, the ankle is put under serious strain and the risk of a fall or sprain is high. To avoid injury or being held back by fear, it is vital to build solid foot placement. Here is how to work on ankle strengthening in trail.
Why is the ankle the key joint for trail runners?
In trail, the feet are in constant contact with uneven terrain. The ankle is the first joint to absorb and correct imbalances. But if it lacks mobility, strength or control, these irregularities can travel up to the knee or hip.
Ankle strengthening in trail must combine muscular strength and proprioception. Muscular strength stabilises the joint, improves impact absorption and makes propulsion more efficient. Proprioception allows you to anticipate imbalances, react more quickly and improve coordination.
By combining these two qualities, the ankle gains stability and efficiency. On the terrain, it improves running economy and reduces energy cost. Paired with suitable trail shoes, it promotes shorter, more precise and more confident foot placement. The trail runner plants their foot with greater confidence, while maintaining control of their stride.

Exercises for ankle strengthening in trail
Several types of exercise enable effective ankle strengthening in trail. Balance or proprioception work improves neuromuscular control and coordination. To do this, you can balance on one leg and increase the difficulty by closing your eyes. You can then train on unstable surfaces such as a proprioception cushion or a BOSU.
Strengthening the stabiliser muscles improves stability on technical terrain and reduces the risk of sprains. Resistance band work is ideal for targeting specific muscles. You can perform outward foot movements to strengthen the peroneal muscles. For the tibialis anterior, you can do resisted toe raises.
The power and strength exercises prepare the ankles for the significant demands of trail. They consist of calf raises to strengthen the calves and small lateral jumps to improve ankle reactivity during changes of foot placement.
Finally, mobility must not be neglected, as it improves the range of motion in the ankle. To work on this, you can perform dorsiflexion exercises, dynamic calf stretches and controlled ankle movements in all directions.

When and how to incorporate the exercises?
Ankle strengthening exercises in trail can be incorporated in different ways. The warm-up is the ideal moment to perform single-leg balance exercises, calf raises, small jumps or mobility movements. These effectively help to activate the stabiliser muscles and prepare the joint for effort.
Once or twice a week, you can also incorporate this work into a GPP session (General Physical Preparation). These sessions can combine proprioception, strength training, light plyometrics and mobility work.
To limit the risk of injury, your progression must be gradual. Over time, increase the volume, difficulty or instability of the exercises. Remember that consistency matters more than intensity. Progressing too quickly can overload the tendons and lead to pain or tendinopathies.
What mistakes should you avoid?
A strong ankle matters, but it's not everything. In trail, it is essential to strengthen the entire lower limbs. If the hip stabiliser muscles are not sufficiently developed, the pelvis becomes less stable, the knee can drift inward and the ankle is then forced to compensate.
Equipment matters. Nevertheless, good shoes and trail socks are no substitute for a strong, reactive ankle. The choice of drop in trail shoes or crampons can provide a degree of stability. However, they develop neither muscular strength nor proprioception.
Finally, rushing through the stages is a common mistake. Wanting to do intense plyometrics or move on to complex exercises without mastering the basics increases the risk of injury. It is therefore better to progress gradually.
Ankle strengthening in trail running is an essential element of race preparation. If you experience pain, reduce your training load or adapt the exercises to prevent an injury from setting in.
Photo credits: Delphine Daniélou