Dancers Pose/Natarajasana
Stand tall with your feet together.
Bend your left knee and bring your left foot toward your glutes. Grab onto the inner arch of your left foot with your left hand and slowly lift your foot toward the ceiling. At the same time, reach your right arm forward and up toward the ceiling.
Actively press down into the floor with your entire right foot as you start to open your chest and pull your lifted leg up. Keep your chest lifted.
Hold on one side for 5-10 breaths, and then switch sides.
It is more important to focus on keeping your hips level than on bringing your foot up high. This will help keep your lower back in a comfortable place and avoid overextension.