Trainer Ron Everline is Bossknown as “Boss” to friends and colleagues, but to his 1.1 million Instagram followers, he's @justtrain. His feed is just about the best place on the internet to see an A-list star—maybe Diddy or Kevin Hart—getting absolutely wrecked by a workout. Of course, some of the huge names, like Russell Westbrook here, make it look second-nature.  

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But Everline says he didn't always aspire to train megawatt stars. Earlier in his life he was focused on playing in the NFL himself. Growing up in a big family (his dad’s one of 21 siblings), he was surrounded by athletic talent and a few former pros. But when it was his turn to go out for the big leagues, he fell short.

“It just wasn’t in the cards for me,” he told GQ. “I made the decision not to dwell on it when things didn’t pan out. Instead, I asked myself what I could do with the talent I had and grow from there.”

Now 36 years old, the new father has made a name for himself as a trainer. He’s even working on his own fitness app when he's not traveling to train entertainers, athletes, and CEOs. GQ caught up with him to find out how he fuels to keep up with (and motivate) his high-profile clients.

For Real-Life Diet, GQ talks to athletes, celebrities, and everyone in between about their diet, exercise routines, and pursuit of wellness. Keep in mind that what works for them might not necessarily be healthy for you.

GQ: What time are you getting out of bed?

Ron Everline: I wake up at 4:15 or 4:30 every day. I try to be out of the house by 4:45 or so. Before I head out, I take a little bit of zinc and then vitamin D in liquid form under my tongue. Then I reach for some cotton candy C4 Smart Energy drink. [Everline is a C4 ambassador.]

Other than that, I don’t consume anything else in the morning—I fast every day. That came from being on the road so much, especially over the past 10 years. I wasn’t able to find great food options, even in some of the best hotels. I’d order something like six egg whites and avocado and peanut butter and before I knew it, I was spending $65. So, the fasting started as a way to be smarter on my spending, but then I came to fully understand the benefits of fasting and it stuck with me even at home. These days, I probably get my first meal between 12 and 1.

And what’s that?

It depends on the day. There’s a local restaurant I love here that does great brown rice bowls with egg whites on top and avocado. At this time, I’m still in breakfast mode. But on super busy days, I’ll send one of the guys to grab Chipotle, but we do it right. So, think brown rice, double chicken, guac, and corn. No cheese or sour cream—I’m big on dairy free.

Why's that? 

If you want my truth, it’s because I think most people are lactose intolerant. When I eat dairy, I feel bloated and I have gas. I got a wife and a kid, and even though I want to blame it on someone else—we all know the truth.

Fair. Are you snacking after lunch?

I recently started to dive into a peanut butter and apple situation. I’m a creamy guy. I'm not into the almond butter trend, but everybody picks their poison. Then I’ll probably have another C4, because I need to stay sharp. For the business, I have trainers everywhere—including in other countries. I need to be on point and alert. I also am big on making sure I’m getting my greens in, so I often hit up a fresh pressed juice spot in the area, add in there some turmeric, ginger cayenne, all those different things, just trying to keep your system at the best possible place.

What about dinner?

Again, we do a lot of bowls. One of my favorites is a “fiesta”-themed with corn and jasmine rice. I know a lot of people are trying to run from carbs, but they’re central to fuel. I don't do any red meat, and I just started adding turkey back into the mix.

Anything else?

Depending on what's going on with my own training, I'll have a protein shake at night, with a very simple chocolate whey protein, peanut butter, ice, and almond milk. That's it.

What time are you getting to bed?

I never want to send the wrong message to people by admitting that I don’t get to bed until 11:30 or 12. Sleep is super, super important. But right now, I’m in a life phase where I’m not getting a lot of it, and that’s specifically why my nutrition is super, super on point. I also don't drink during the week, unless there’s a Thursday night football game. And in that case, I’m a tequila guy, or I’ll drink a glass of wine with my wife. Sometimes you’ve got to break those boundaries in order to kind of relax. Life can’t be so super strict all of the time.

Speaking of strict, do you have a sweet tooth?

Oh yeah. I try to live my life mostly at 80 percent in control, 20 percent indulgence. Oreos are definitely my weakness. And not just like, one Oreo. The only way I’m only eating one Oreo at a time is if there’s only one left in the sleeve. Otherwise, it’s the sleeve. I’m also big on mixing both caramel and cheese popcorn together. I find that every once in a while, that’s O.K. You gotta learn how to be consistent with your health, and have a little bit of leeway. That’s not only gonna make your life better, but it's going to make the lives of the people around you better, too.

Read MoreThe Real Life Diet of Rob Zombie, Who Thinks Eating Vegan Is Metal 

For the heavy metal musician and horror director, cutting out meat and dairy wasn’t just critical for his health—it was about fighting the establishment.

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