Hi, I am considering becoming certified as a personal trainer or fitness instructor. The first problem I'm having is that I have come up with close to a dozen national organizations that offer training and testing (ACSM, NSCA, NASM, AFAA, ACE, ISSA, AFPA, and more!) Can you tell me what the top three or four organizations are in terms of reputation within the fitness professionals community? I would greatly appreciate your help. Thanks!