To become a fitness instructor you will need to complete a course in personal training and take a test to get your certification. Many complete this online, although some community colleges offer similar coursework to prepare you for the exam. CPR certification is required for all healthcare fields, and it's an easy one to three day course. If you haven't completed it yet, sign up for the class! When you talk about your certifications, make sure they are current if it's something that needs to be renewed.