As a fitness instructor, it is generally recommended to hold two certificates. One is the certificate recognized by China, such as the national vocational qualification certificate or the certificate issued by CBBA. Although many people think that the gold content of these two certificates is not high, they belong to the domestic system of China after all. On the other hand, it is recommended to hold international private education certification. At present, in the world, the certificates of scientific research institutions such as ACSM and UKK have high gold content, while the certificates of associations such as NSCE, ACE and NASM have high authority because of their wide coverage.