I don’t know if a personal trainer will help much to make an actress who’s 5’4” in heels look 6’1” barefoot....
That’s the cinematographer’s job. And they’re good at it. Most of Hollywood is pretty short, but how many times in a movie or preview have you ever seen anyone look taller than Tom Cruise? Appleboxes, short co-cast members and some up angle photography 5’4” can look like 7 feet, 6’1” is a gimme.