A top personal trainer shares 3 common mistakes people make when trying to build muscle

Aug 16, 2026 04:30 PM - 1 hour ago 1

Smiling personification successful achromatic diversion clothing stands pinch arms crossed adjacent thenar trees and a beach.

Harley Pasternak spot trains for 20 minutes, six days a week. Harley Pasternak

Harley Pasternak has spent 30 years helping group build spot and muscle.

In that time, the 51-year-old Los Angeles-based individual trainer, who has worked pinch Kim Kardashian, Rihanna, and Robert Pattinson, has seen group making the aforesaid mistakes, which support them from making the gains they want to see.

Progressive overload, which intends challenging your muscles much and much complete time, whether done heavier weights aliases much reps, is important to building muscle, but there's much to it than conscionable that, Pasternak told Business Insider.

Rest and a thoughtful workout scheme are besides important if you want to build muscle, he said. For Pasternak, that intends strength training for 20 minutes, six days a week, and focusing connected 2 muscles per workout.

Pasternak shared the communal mistakes he sees group make.

Worrying astir looking 'bulky'

Pasternak said he often sees women holding backmost erstwhile lifting weights because they are worried astir looking "bulky."

"It's very difficult to put connected muscle," he said.

Building muscle requires eating much nutrient than you burn, besides known arsenic a calorie surplus.

Regardless of really it changes your assemblage shape, lifting weights besides carries galore wellness benefits, including reducing the consequence of osteoporosis.

Doing full-body workouts

Pasternak isn't a instrumentality of full-body workouts if group want to build muscle.

Training tons of different musculus groups successful 1 convention tin mean that by the clip you scope the last fewer exercises, you are excessively fatigued to activity those muscles difficult capable to make meaningful progress, he said.

"There's a awesome quote, 'I fearfulness not the man who knows a 1000 different kicks. I fearfulness the man who knows 1 footwear a 1000 times,'" he said.

If you're training 15 assemblage parts successful 1 workout, "you're astir apt not giving overmuch to the past 5 assemblage parts," Pasternak said.

Not giving muscles capable clip to recover

Training difficult is only 1 portion of building muscle. You besides request to springiness your assemblage capable clip to recover, Pasternak said.

Resistance training creates micro-tears aliases injuries successful musculus fibers. During recovery, those fibers repair, becoming stronger. "That's really we accommodate to the stimulus," he said.

But if you train the aforesaid musculus again earlier it has afloat healed, it tin interfere pinch that process, stalling your progress, and perchance starring to injury, he said.

Muscles besides thin to retrieve faster than connective tissues specified arsenic tendons, he said, truthful pushing the aforesaid assemblage portion excessively often tin origin problems moreover if the musculus itself feels fresh to spell again.

Pasternak said group who train pinch a meaningful magnitude of strength should time off aggregate days earlier moving the aforesaid assemblage portion again.

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Kim Schewitz is simply a wellness newsman who covers our growing obsession pinch wellness optimization and -maxxing, and really it influences popular civilization and Big Business.Since 2023, she has interviewed dozens of doctors, researchers, and dietitians astir their science-backed wellness advice, often focusing connected the gut microbiome and the Mediterranean diet, and reported connected the emergence of young colon crab and really its impacting the lives of diligent successful their 20s, 30, and 40s. She has antecedently written for VICE, The one paper, and GLAMOUR UK.

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