I support Joanne’s view on this question as far as scope of practice is related to specialties.
However, as far as marketing goes, by selecting specialities on this portal in particular, it in no way means that I am the best or even FULLY qualified to educate others in these areas. I think that in this industry you’ll find that experience and knowledge can outpay you considerably as compared to formal education. That trend seems to be changing, but I think that the majority of people who select specialties on fitness connect would agree with me in that they select these specialities as a way of letting others know that they have some personal experience in those areas, and that those areas are areas that they, as fitness professionals, are interested in.
In a perfect world, yes, every specialty chosen or advertised is backed up by a certification or a license, but for purposes of finding clients that are good matches, and allowing clients to choose a trainer with common interests, people often choose specialties based on personal experience rather than formal education. I think it works out well that way.
As far as being jacks of all trades fitness, I think any trainer worth his/her salt will know at least something about most areas of fitness. At a minimum, a trainer should have a good network of other fitness and health professionals from which he/she can learn. This network is also great for referring a client to others who will be able to further that client’s needs.