It really depends on the person and what kind of classes they teach. My classes are very cardio intensive and require a lot of participation on my part. I can only do that so many times per week. But if I were able to add in classes that worked different parts of my body and gave my body a break, then that would be different. There is an instructor at my club who teaches at least 10 classes each week, but she has the ability and the classes vary.