NASM, or the National Academy of Sports Medicine, is a leading organization that provides education and certification for fitness professionals. Founded in 1987, it focuses on evidence-based training techniques and offers various programs, including personal training and nutrition coaching. The NASM certification is recognized globally and emphasizes a systematic approach to fitness, known as the Optimum Performance Training (OPT) model. This model helps trainers design effective workout programs tailored to individual client needs, promoting safety and optimal results in physical performance.