Since 1987, the National Academy of Sports Medicine (NASM) has been a global leader in providing evidence-based certifications and advanced specializations for fitness professionals. Its Optimum Performance Training Model (OPT™) was developed to help fitness professionals positively transform lives through a progression of five training phases: stabilization endurance, strength endurance, hypertrophy, maximal strength, and power. Academic institutions throughout the U.S. incorporate NASM’s leading fitness content as part of Certified Personal Trainer courses and degree programs. The vision of NASM is to empower fitness and wellness professionals, supporting them in their goal of motivating clients to lead healthier lives.