CPT is the abbreviation of personal education certificate, personal trainer certificate, not certification itself. Each certification body has its own CPT certificate. At present, the world's top fitness instructor certificates are ACSM, NSCA, AISI, NASM and UKK. Among them, NASM is the largest institution in the world, with more than 500,000 certified people. ACSM and UKK have the richest achievements in the field of basic research, and belong to the cornerstone research institutions. ACE has the best standardization level, and NSCA ranks first in the world in the field of physical training.