Standing on one leg improves balance and ankle stability, which means it’s a good idea to practice single-leg standing poses often. This Vrksasana variation promotes agility in your lower legs, ankles, and feet, while transforming your lifted foot into a sensor of sorts (which provides feedback on the wobble situation in your standing ankle). This modification is particularly great for those who have trouble balancing on one foot.
Stand on your left foot and bring your right foot to the inside of the left ankle, so the right foot becomes a stabilizer and “sensor” to monitor the left ankle’s movement. If it’s wobbly, home in on the ankle while remaining connected to your core and breath. Stay here for 5–10 breaths, then switch sides.