Due to out fast-paced society, fast-paced because new discoveries are being made all the time which ends up in things change regularly, even personal fitness trainers need to take CPE courses in order to stay in good standing professionally.
As a former personal trainer myself, I must say, however, that the typical trainer may still not be as well-informed as such accreditations may wish to suggest.

Those employed by chain gyms, which is the majority of those today, are often kids for whom personal training is a gig they happen to have come upon.
At something like New York Sports Club (NYSC), they wear the red tee shirts that say “here to help you.”
Now some are, obviously, quite knowledgeable and rather interested in the subject, but for most it is just a job that appeared to fit nicely with a relaxed interest in sports.

The certification exam they take is genuine and rigorous enough for any employing a multiple-choice format, yet it’s really nothing more than a memory test and actually indicates no real expertise.
The needed CPE courses run generally along the same lines, regurgitating facts by rote.
Truth be told, these trainers do not know anything that could not be gained by anyone who logs online.

Of course, one may say the same of any occupation – but when it comes to physical fitness, the very nature of the discipline permits for no small amount of misinformation and outright quackery.
The explanation for this is really quite simple: no one truly knows.

Yes its true.
I’m a former personal fitness trainer and the only one who can tell the absolute truth: no one really knows.
Unless he or she is God or was there at the creation of Adam and Eve, no one really knows.
Hence, all the personal trainer CPE courses in the world isn’t going to make up for this plain but shocking truth – “the human body is centuries prior to medical science,” as Doctor Sir Roger Bannister said.