Would you set up a website with the domain name/ url extension .PT?
Aside from the possible confusion with physical therapists (so therefore, .cpt might be better), I think that having a more common ending like .com makes it easier for trainers to get ‘ancillary traffic’ when people are casually browsing the internet, which might not be the case with .pt.
LaRue, CSCS
www.lecfitness.com