If there's one thing that makes Tracy Anderson's workout routines stand out, it's the iteration. Joseph Pilates "stopped at 350 moves," Anderson said on the Glossy Beauty Podcast. "And I've got thousands upon thousands of sequences."

That extends to live workouts, which Anderson favors over a rote streaming approach. "I'm not nervous to put the pressure on me. Every week, no matter what's going on in my life, I have to show up for everybody."

This includes running the business side of her eponymous company, which she previously parsed out to other people. Despite having high-profile clientele like Gwyneth Paltrow and Jennifer Lopez, Anderson has preferred the slow and steady approach to growth versus rapidly scaling.

"I'm the CEO now because other CEOs did not share my vision, and they felt really uncomfortable to me," she said. "At the end of the day, when you want to own a business, or if you're a founder, it's like parenting, in a sense. You might wish that the nanny can teach your kid all the lessons or parent them, but that's not parenting at all. That's giving away all of your power. That's not going to inject your child with all of your magic and all you have to offer.... There have been chapters of owning this business that I'm definitely not proud of. So me being in the CEO position is the moment for me to say, 'OK, you can't let somebody else change all the diapers.'"