Meet Tony Robbins' 24/7 personal trainer, who helped turn Dwayne 'The Rock' Johnson into a movie star

Tony Robbins is 57 years old but his schedule is as physically grueling as it's ever been. As the world's most famous life coach, Robbins is constantly traveling the world and averages 60 events annually. It's common for him to put in 16-hour workdays during one of his signature seminar events, and much of that time is spent jumping and running around a stage. This is where Billy Beck III comes in.

Robbins hired Beck as his full-time personal trainer four years ago, and Beck has helped him accommodate an increasingly busy schedule as he gets older.

Beck has his own gym in Florida, has twice won the Met-Rx Personal Trainer of the Year competition, and has had clients like Dwayne "The Rock" Johnson, NHL and NFL athletes, UFC fighters, and boxers.

Most of his time now, though, is spent traveling the world with Robbins to make sure he maintains his energy throughout his relentless schedule. Beck even bought a house near Robbins' main residence in Palm Beach, Florida, and has his own place next to Robbins' Fiji house.

Business Insider recently traveled to Robbins' Fiji resort Namale and spent several days with Robbins and Beck. And even though Robbins is Beck's client, it became obvious that the two are also great friends. Following is a transcript of the video.

Tony Robbins: Wow, look at the kind of animals that we have here in this forest! It's a lion!

[Meet Tony Robbins' personal trainer]

Billy Beck III: I'm Billy Beck III - trainer to a bunch of people, but in this episode, I am the exclusive trainer to Tony Robbins. We're in Namale. This is Tony's resort in the Fiji islands. This is my little sanctuary. This is where he hides me.

I've trained hundreds of professional athletes. When they come to see me, I take every factor that makes someone better physically, mentally, emotionally, and I make them a complete athlete.

[Beck travels the world with Robbins ...]

Beck: No one does more preparation than this man right here.

[... and it's clear they're best buddies]

Robbins: Yeah, Billy has a hard time having a good time. It's his most difficult situation. He was depressed when I met him. It was an amazing thing.

Beck: Yeah, you are amazing! I wasn't feeling good about myself.

Robbins: We have to figure out how to reverse that pattern. It's a little out of control.

Beck: By the time I was 13, I had to make a decision because I grew up in a trailer. I could either have a bed or a weight bench. So, I slept on a weight bench for three years. I didn't confine myself to exercise. I started studying nutrition. Then, I started looking at sports performance.

Dwayne "The Rock" Johnson - I was very blessed to be able to work with him. Worked for him like seven years or something like that. It was when he was looking to go from wrestling into movies.

Richard Feloni: How long have you been working with Tony?

Beck: Like four years?

Feloni: And you check in how often? A daily basis?

Robbins: Pretty much daily. Yeah. When we're at events, it's every day because he's there with me. When I'm on the road, it's not every day. But, we're dear friends also, so we're always connecting, communicating. But, it's constant. Yeah. He's really there because we're always adjusting things to what the environment demands from me.

Beck: He's on stage 12, 14, 16 hours, and he's completely immersed the entire time. My job is to actually stop him sometimes so I can refuel the tank. The level of technology and science that we employ to make him the best he can be is insane. We'll get an extra room in a hotel and bring a portable hyperbaric chamber. I mean, we do cryotherapy. We'll bring it with us. We do lab testing. I do genetic testing to determine what he actually needs more of, you know, from his DNA. So, we're never guessing. I don't like to guess. There's no reason to guess with the way we have technology now.

He pushed his body so hard for so long, that he got in debt with his body. He expended so much without replenishing it, that his body got really beat up. We've been able to correct a lot of this. In the last four years he's - like, this is the best shape he's ever been in.

Robbins: Billy!

Beck: Teamwork makes the dream work!

I see him do stuff all the time that people don't know about. He just loves people, and he hates to see people suffer, and like, if I wanted to be like anyone in the world, it would be like him.