Become a NESTA Certified Personal Fitness Trainer. NESTA provides the quality education and personalized support you need, so you can earn your certification with confidence. As a NESTA Certified Personal Fitness Trainer student you will learn to: Accurately assess the health, fitness, and skill levels of clients, using this information to create clear, realistic goals. Design workouts based on the individual client’s needs and goals, grounded in sound scientific principles. Correctly demonstrate and instruct exercise techniques utilizing proper biomechanics and motivation principles. Articulate your professional scope of practice as well as the NESTA code of ethics. Detail how you plan to market and sell your personal training services in order to gain new clients. And how to deliver proper service to maintain your client base.