Where is the best place to obtain a group fitness instructor certification?? I work out but have not taught a class.
Here is a tool that will let you compare some of the major certifications. It is created by ACE (that offers its own certification), so of course good to look at other places as well. The top lists usually include ACSM, ACE, AFAA, and a few others.
http://www.acefitness.org/fitness-certifications/personal-trainer-certif…
You might also look in your local area to see what certifications other instructors have, and which are accepted by most of the places where you would like to work.
Good Luck