Hello!

To become a fitness trainer, first of all , you need to get certified from a good institution.A good institution will teach you all that is required to become a fitness trainer.

It will take you a few weeks to complete the course. Then you can start applying for jobs.

You want a nationally accredited certification that uses a PROCTORED exam. Look into ACSM, NSCA, or NASM.

Thankyou!

Hope it helps!