Kim Kardashian's Trainer Just Posted A Before-After Photo Of Her Impressive Butt Transformation

To proudly show off her progress, Alcantara just posted a side-by-side photo on her Instagram.

View this post on Instagram A post shared by Melissa Alcantara (@fitgurlmel) on Jan 24, 2019 at 9:00am PST

LBH, her body looks awesome in both photos. But her butt appears stronger and more toned in the second image. Alcantara is the totally willing to admit that the change wasn't easy. "6 years of trying, failing, succeeding. 6 years of obstacles, doubts, triumphs. Of several plateaus. Of changing programs. Of maybe I need to do this or more of that," she captioned her before-after photo.

If this sounds familiar, the celeb trainer reassures: "THIS IS REALITY. THIS IS NORMAL. If this is you, YOURE ON THE RIGHT PATH."

"One thing I never did was quit," she wrote, "this is what separates the ones who get what they want from the ones who get what they get."

View this post on Instagram A post shared by Melissa Alcantara (@fitgurlmel) on Sep 18, 2018 at 10:30am PDT

In previous booty transformation photos on her Instagram, Alcantara emphasized that she weighs exactly the same as she did six years ago. She also noted that weight is arbitrary: "The number means nothing if you don't feel good," and "you're more than just a number on a scale."

So...what does she do to sculpt that backside? Alcantara tells Women's Health that the workouts she does with Kim Kardashian echo her own. That means, "when it comes to booty and legs, we usually work out for an hour and a half to an hour and 45 minutes," says Alcantara.

View this post on Instagram A post shared by Melissa Alcantara (@fitgurlmel) on Dec 22, 2018 at 12:40pm PST

And you may be surprised to learn that she only targets her legs and glutes twice a week. "The legs are a large muscle group and need time to recover. Thats when they grow, thats when everything happens," she says. "You want to work out efficiently and be smart about it."

But, don't get her wrong, waiting to do a butt workout isn't always easy. "Sometimes I think I want to do legs again, I want to work on my ass-but I have to remember to chill and give it time to recover," she says.

Her workouts consist of everything from squats, to lunges, glute bridges, hamstring curls, glute kickbacks, and more. You can check out her full butt workout here .

View this post on Instagram A post shared by Melissa Alcantara (@fitgurlmel) on Jan 12, 2019 at 8:29am PST

Case-in-point: Keep plugging away at your fitness goals and remember to rest when you need it-that's when you get those #gains.