A 38-year-old fitness founder shares 2 habits she uses to build muscle

Aug 11, 2026 09:17 PM - 1 hour ago 1

Morgan Kline

Morgan Kline, the cofounder of Burn Boot Camp, loves compound exercises for illustration deadlifts and pull-ups. Morgan Kline

Morgan Kline grew up being progressive — she was a dancer and three-sport athlete successful precocious school, playing soccer, volleyball, and basketball. It was erstwhile she started assemblage that her routines crushed to a halt.

"When you're nary longer portion of a squad anymore, and you're not playing collegiate athletics, you person to find your spot again," Kline, 38, told Business Insider. While she tried moving retired astatine the field rec halfway and a fewer Les Mills pre-choreographed group fittingness classes, thing stuck. Then, her narration to her assemblage started to change.

"A batch of my assemblage image issues really bubbled successful college," she said.

Morgan Kline

Kline cofounded Burn Boot Camp, which now has complete 400 locations crossed the US.  Morgan Kline

Just a fewer years aft graduating, Kline cofounded Burn Boot Camp, a fittingness franchise, pinch her husband, Devan successful 2012.

She said she nary longer useful retired solely for appearances, which "can get really exhausting" arsenic a motivator. Burn Boot Camp studios don't see mirrors. While gym-goers whitethorn usage them to cheque their shape passim class, Kline believes trainers should beryllium the ones to springiness feedback connected safe movements, and personally finds mirrors to beryllium excessively distracting.

Now, her workouts are "about doing difficult things each azygous day, making fittingness a priority, and mounting patient examples for your children," Kline said. "It's truthful erstwhile I americium a grandma, I tin still prime up my grandkids. Those are the things that I'm training for now."

Kline, who strength-trains astir 4 to 5 times a week, shared a fewer habits she's followed for complete a decade that helped her consistently build muscle.

2 elemental compound workouts target galore musculus groups

Morgan Kline

Kline useful connected going heavier connected her deadlifts and expanding her pull-up rep counts.  Morgan Kline

Compound exercises target aggregate musculus groups astatine once. Kline has 2 favorites: deadlifts and pull-ups, which she consistently useful connected astatine the gym.

Deadlifts strengthen her glutes, hamstrings, back, and core. " I tin construe that truthful overmuch into my mundane life," she said. As a mother of 3 kids — ages 10, 8, and 6 — she said deadlifts thief make it easier to "lift them up, aliases assistance up things astatine the location that I don't request my hubby for."

As for pull-ups, she finds them valuable because they're particularly harder for women to do, arsenic women typically transportation little upper-body mass. "That's thing that I'm perpetually trying to activity on," she said, arsenic pull-ups build up muscles successful her arms, shoulders, lats, and core.

She keeps her protein-rich fare simple

Morgan Kline pinch son

Kline tries to see macromolecule successful each meal, including snacks.  Morgan Kline

When it comes to nutrition, Kline knows that macromolecule is simply a "hot topic" correct now. However, she doesn't overthink her intake aliases bargain into ultraprocessed macromolecule products.

"I effort not to obsess astir it," she said. " As agelong arsenic each repast that I person — breakfast, lunch, dinner, and a snack aliases 2 — tin halfway astir getting good, whole-food macromolecule in, and coupling that pinch carbs and fats, that's conscionable really I person really led my nutrition for the past 10 to 15 years."

One of her go-to meals is chickenhearted aliases crushed beef pinch saccharine potatoes, rice, and vegetables to information retired the repast pinch carbohydrates, fiber, and different nutrients. She besides loves eggs and chickenhearted sausage successful the greeting and uses plant-based macromolecule powder successful her smoothies.

Ultimately, she said her routines, which she's kept for years, free her up to deliberation astir different things too really her assemblage looks. "I would beryllium lying if I said I don't person goals — we each want to look bully because erstwhile we look good, we consciousness good," she said.

It's conscionable that she doesn't want to attraction connected that each the time. "You're perpetually looking successful the reflector and looking for value, whereas I've shifted my mindset to look for worth successful different ways successful my life."

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Julia is simply a elder wellness newsman astatine Business Insider. Julia covers a wide scope of topics, including the rise of colon cancer cases among young people, the unsocial challenges modern parents face, and the increasing inclination of Gen Zers abstaining from societal media. She besides writes astir fitness, nutrition, longevity, and the routines of highly successful group for Business Insider’s Power Hours series. She’s published interviews with Arnold Schwarzenegger, Serena Williams, Esther Perel, Bill Nye, Naomi Watts, and James Van Der Beek.Julia's activity has appeared connected the BBC, CBS, Bloomberg Radio, Morning Brew, Fast Company, and the Daily Flash. She has besides moderated sheet discussions astatine Nasdaq and Duke University, and appeared connected the podcasts Open to Debate, Airtalk, The Evan Bray Show, and The Last Show pinch David Cooper. Prior to this role, Julia was an acquisition and individual improvement editor connected the Business Insider Reviews squad and a activity and relationships editor astatine Cosmopolitan and BuzzFeed, respectively.You tin opportunity hullo to Julia astatine [email protected] and cheque retired much of her activity connected her website.

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