
A personal trainer at the bare minimum should be certified by an accredited authority. But some trainers have college degrees in exercise science along with the certification. The degree just broadens a person's horizons as far as a career is concerned. The certification is more targeted. If you choose to take the certification route then you are pretty much locked in with what you want to do. I knew I wanted to be a personal trainer so I became certified through NASM.
Personal trainers should hold a NCCA-accredited certification from a recognized and credible organization, (such as the National Academy of Sport Medicine). This will give you the assurance that a fitness professional has the knowledge and skills to provide you with a safe and effective exercise program. In addition, all personal trainers must have a current CPR/AED certification to be able to respond appropriately during emergency situations.
While an NCCA-accredited certification is the credential you should look for, a college degree in a related field (e.g., exercise science, exercise physiology, kinesiology, athletic training, biomechanics, nutrition, or physical education) is a big plus. This lets you know that a personal trainer has a solid education background regarding health, wellness, and exercise prescription.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.