I have a great personal trainer. I did a little write up for her last year. River (Rio) Norella. http://www.chapala.com/webboard/index.php?showtopic=48314&hl=fitness
Very reasonable, knowledgeable and experienced... like over 20 years. Does house calls and will work around whatever equipment you have or don't have, in my case.
Most of the "trainers" at local gyms have no experience beyond their own fitness training. Most have no experience adapting routines to personal needs. The situation is very different than NOB, where you might assume that trainers are available. The gym in Chapala doesn't have an English speaker, if that is an issue for you.
Home phone 766-1411
cel: 331 177-0405 (leave message, teenager in charge of phone at the moment )
Edit: This cel number is current. The one in the post from last year is not good.