ACE and NASM both does a great job for the general population, but NASM puts a slight bit more emphasis on corrective exercise. However, any of the certifications you have mentioned will get your foot into the door.
Broadway theatre, commonly known as Broadway, refers to the theatrical performances presented in the 41 professional theatres with 500 or more seats located in the Theater District and Lincoln Center along Broadway, in Midtown Manhattan, New York City.
It opened on Broadway on October 30, 2003, and is the highest-grossing musical to date. The original Broadway production eventually spawned productions in Chicago, London, Los Angeles, Tokyo, Stuttgarbourne, San Francisco, Sydney, Oberhasen, and Osaka, as well as two North American tours that have visited over 30 cities.