What type of classes would I need to become a fitness instructor?

I would ultimatly like to become a prenatal fitness instructor, but I need to become a regular fitness instructor first. If I am taking college classes, what classes would I need to take for this?|||you should become ACE certified to begin with. That certifies you to beceom a personal trainer. You study on your own and set up a time to take the final exam. google it.|||idk|||Start with different PE classes and Health classes that focus on nutrition and fitness. Some Biology classes will help as well.