Being a Presonal Trainer is an ever rewarding job. But you need to have certain competency like:

Skils : You need to have multiple skills like to be analytical, patient, nurturing, and persistent. You must have a deep sense of being a good organizer, an effective motivator to train the personal for a lasting commitment. Above all you should be a good listener. You must have sober habit and must have a respectable and attractive personality.

You must have an adequate academic qualification and the certification in this field of profession. You must have a speciality and you must always update your knowledge and competency. You should be dynamic.