American College of Sports Medicine (ACSM) Personal Trainer Certification

The ACSM personal trainer certification is one of the top certifications a professional in this industry can hold.
ACSM offers multiple certifications..

The requirements to obtain the ACSM personal trainer certification include:
Applicant must be 18 years old
High School Diploma or equivalent
Adult CPR qualification
Pass the 2.5 hours exam consisting of 125-150 questions
The exam cost is $279

ACSM offers 1 - 3 day workshops to help prepare for the exam and you must renew every three years.