After receiving help with this question I began working out my weak gluteus medius. Very rapidly I became able to do the exercises without pain or losing balance, and no longer feel pain while walking backwards or rotating my toe inwards. So... can I remove those exercises from my daily workout? Or is there a chance that my body will once again stop using the gluteus medius if I don't remind it how?
The same question goes for clam shells. I don't have as much proof that the exercise is working, but I gather that almost everyone gets results from clam shells as long as they actually do the exercise. So can I stop doing them and spend my limited workout time on other body parts instead?