You should have an open dialogue with any instructor or personal trainer. It’s important that you feel comfortable asking questions or saying that something doesn’t feel right while doing a particular exercise.
It’s important for you so that you learn how to do the exercises properly without getting injured, but also important for your instructor so that he or she can give you proper cues to help you engage the right muscles or remind you of the area you need to work.
Asking questions is very important. It’s true that if you’re not certain about something, there are probably others with the same question. As instructors we may not always have the answer right away, but we can find out after class. Then instructors and clients can learn together.
As with any relationship, communication is key.