I’ve been a successful personal strength trainer for many years and would like a certification.
I’d be curious to know how you define fast.
If you are already successful, then it would appear to me that time is not of the essence unless it is necessary at your place of employment.
Many people say to me that I am completing my second masters degree “fast.” I am finishing it this May and started last May. Is it fast? I believe it is subjective and also depends upon the academic skin you’ve put into the game. If you have made an academic investment over the time you have been a strength trainer, then it should take a long time.
If you haven’t then the American Council on Exercise suggests a time line of 3-6 months. I hope this is helpful to you.