What training does a personal trainer need?

Personal trainers as a whole have diverse training backgrounds. Some are college educated, some are not. Some are athletes, some are not. Most personal trainers in gyms are basically sales people. If you want to pursue a career in PT, most gyms require certification.

Some common organizations offering certification are:

ACE-The American council of Exercise

NASM-The National Academy of sports Medicine

ISSA-International Sports Sciences Association

NSCA-National Strength and Conditioning Association

ACSM-The American College of Sports Medicine

AFAA-Aerobics and Fitness Association of America

Ask the gym you want to work for which certifications they require and then study for those.

You must a genuine interest in your clients and not be shy. Build up your clientele.