If you've got a month and a butt, I've got a bomb-ass (heh) program that's definitely worth it's weight in sweat. I guess, technically, Anna Victoria, certified trainer and creator of the Fit Body app, is the rightful owner of this butt-transforming workout, but the point is that it's really good and you're gonna love it.

How do I know this? Well, assuming you found this glorious article via serious internet research, you're looking for a fitness challenge that'll work your lower body and help you gain muscle (ideally in le booty). And what's especially great about this month-long program is that it doesn't require any weights, resistance bands, or even a chair. All you need are your legs, maybe a yoga mat (I said maybe!), and a beat to make this whole thing more fun.

Ready?! Let's go!

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THE MOVES

Here, the moves you'll be crushing over the next 30 days, how to perform them, and how many sets and reps you'll do each week.

Squat

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Ben Ritter

1) Stand with your feet slightly wider than shoulder-width apart, turning out your toes and knees slightly.

2) Bend your knees to lower your body like you’re sitting in a chair, keeping your chest up.

3) When your thighs are parallel to the ground, push up through your heels and toes to raise yourself back up. When you reach the top of the move, squeeze your glutes. That's one rep.

Squat Pulse

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BEN RITER

1) Stand with your feet slightly wider than shoulder-width apart, turning out your toes and knees slightly. Bend your knees to lower your body like you’re sitting in a chair, keeping your chest up.

2) When your thighs are parallel to the ground, slightly straighten your knees, then bend them again so your thighs are parallel.

3) Push up through your heels and toes to raise yourself back to standing position. When you reach the top of the move, squeeze your glutes. That's one rep.'

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Squat Jump

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BEN RITTER

1) Stand with your feet slightly wider than shoulder-width apart, turning out your toes and knees slightly. Bend your knees to lower your body like you’re sitting in a chair, keeping your chest up.

2) When your thighs are parallel to the ground, use your arms and push through your heels to jump straight up as high as possible. Squeeze your quads and glutes as you jump, and land softly back in the squat position. That's one rep.

Sumo Squat + Toe Raise

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BEN RITTER

1) Stand with your feet two to three feet apart, turning your toes and knees out slightly. Bend your knees to lower your body like you’re sitting in a chair, keeping your chest up.

2) When your thighs are parallel to the ground, push up through your heels and toes to stand, and raise yourself onto your tippy toes.

3) Squeeze your glutes at the top of the move, then lower your heels. That's one rep.

Step-Out Squat Hold

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BEN RITTER

1) Stand with your feet slightly wider than shoulder-width apart, turning your toes and knees out slightly. Bend your knees to lower your body like you’re sitting in a chair, keeping your chest up.

2) When your thighs are parallel to the ground, shift your weight to your left leg, brace your core, and step out your right leg about six inches to the right.

3) Bring your right leg back in. That's one rep. Complete the suggested number of reps on the right side before switching to the left.

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Side Squat

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BEN RITTER

1) Stand with your feet two to three feet apart, turning out your toes and knees slightly.

2) Keeping your chest lifted, shift your weight to your right side, and bend your right knee until your right thigh is parallel to the ground. Your left leg remains straight.

3) Push through your right heel to return to the standing position. That's one rep. Complete the suggested number of reps on the right side before switching to the left.

Narrow Squat

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BEN RITTER

1) Stand with your feet slightly closer than shoulder-width apart, turning your toes and knees out slightly. Bend your knees to lower your body like you’re sitting in a chair, keeping your chest up.

2) When your thighs are parallel to the ground, push up through your heels and toes to raise yourself back up to stand. When you reach the top, squeeze your glutes. That's one rep.

THE PLAN

a chart of the prescribed days and exercises
John Francis

All of these exercises come together in this 30-day challenge to help you create a strong, literally well-rounded backside, says Victoria. "These moves target all of your glute muscles from a variety of angles, which is absolutely necessary for a toned booty," she says.

Each day, you'll tackle one—seriously, just one—squat variation for the recommended sets and reps. And although the types of squats stay the same throughout the entire challenge, the number of sets and reps steadily increase—as will your butt.

PRO TIPS

Check out the plan above, and follow Victoria's advice below to make the most of your squat sessions each week.

Week 1

"Keep in mind that squats are about quality, not quantity! Don't just power through each rep—really squeeze your glutes during each one for maximum booty-muscle engagement."

Week 2

"When done properly, squats are just as much of a core exercise as they are a butt workout! To ensure that you engage your abs during each rep, focus on inhaling during the easy part of the movement, like lowering yourself into a squat, and exhaling on the hard part, aka pushing yourself back up to stand."

Week 3

"At this point in the challenge, your gluteus muscles should feel stronger. You're building endurance! This week, we're adding more reps to keep pushing your limits. This is exactly what you need to see the results you're already feeling."

Week 4

"Thirty squats per set might seem like a lot, but don't tap out early. Keep in mind that making it through the last, hardest reps will get you to your goal on schedule."

Week 5

"This is your last week, which means your glutes are at their strongest! Polish off these final six workouts by focusing on the tension in your legs and butt through each and every rep. You got this."

Headshot of Ashley Oerman
Ashley Oerman
Contributing Writer

Ashley Oerman is a contributing writer at Cosmopolitan, covering fitness, health, food, cocktails, and home. You can follow her on Instagram @AshleyOerman. She is pro-carbs.