There are many personal training certifications in the fitness industry. (fitwirr.com)
And, I've completed personal training certifications from the National Strength and Conditioning Association (NSCA), the National Academy of Sports Medicine (NASM), and Reebok University. (ab-core-and-stomach-exercises.com)
Must hold a nationally accredited Personal Training certification (ACSM, NSCA, NASM, AFAA, and ACE preferred)... (simplyhired.com)