Standing leg exercises are the best leg exercises because they work on balance, coordination, flexibility, core strength, and all the major leg muscles at once. (best-leg-exercises.com)
Experiment with the internal rotation in exercises like inner thigh lift, standing leg press with ring and rainbow. (verywellfit.com)
Be mindful in this pose that the back standing leg does not collapse; rather, imagine lifting through the thigh in order to maintain integrity. (mindbodygreen.com)