I guess the idea that there needs to be more out there for us +50 athletes is kind of part of my motivation to pursue the ACSM wellness certification. There are several ways to qualify for the training course and being a therapist/counselor is one of them. Older people are willing to pay for this service (at least around here) as they often have some life experience with what happens to your health when you don't stay active. I like the idea of combining my 2 interests (fitness and counseling), being able to have my own business, without having to deal with health insurance as a motivator. I always will have to do clinical work at least a few hours a week to stay current; besides I really like what I do.
I've thought about resurrecting my ACE certification (it's been 15 years), only to teach senior classes, or at least slightly easier versions of boot camp/spin, etc. But, I know what will happen, I'll get burned out, so that will stay a thought in my head!