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.
Cats opened on Broadway at the Winter Garden Theatre Oct. 7, 1982, where it ran for 7,485 performances before closing Sept. 10, 2000. It held the title of Broadway's longest-running musical, but was surpassed by Lloyd Webber's other hit, The Phantom of the Opera, which currently holds the title.