The 41 piece collection—called Performance—drops today, and includes tops, bras, leggings, hoodies, jackets, and jumpsuits in a mix of black and white fabrics with glossy and matte finishes. All pieces are designed for sizes XS to 4X (they refer to them as size 0-7, respectively). The line also features next-level features such as four-way stretch, antiperspirant and anti-pilling materials, UV protection, and cooling properties. And as if the clothes themselves weren't enough to win you over, the campaign features confident fitness pros from a variety of backgrounds including fitness trainer Emily Skye, MMA champion Mackenzie Dern, and model Candice Huffine.

For its launch, the brand held a workout class with New York City-based trainer Akin Akman, who is known for his butt-busting boot camp workouts—and this one didn't disappoint. Upon pulling on the GA Icon Biker Shorts ($65; goodamerican.com) in preparation for class—a style I wouldn't ordinarily choose—I felt totally comfortable. The compression fabric and high waisted design held everything in place, and the extra-long length didn't make me feel self-conscious, or as if I was trying too hard to follow a trend. I typically exercise in full-length tights, but the GA shorts now have me sold on the above-knee length. 

I felt great doing all the moves, from burpees to leg lifts, and I was impressed that the fabric didn't feel like it was riding up. Best of all, my legs weren't chafing as they sometimes can in shorts that are cut higher. Another selling point: The fabrics are thick enough that you don't have to worry about anything being see-through, but they're also not so thick that they're restricting. While I'm into the shorts, there are also leggings in cropped or full length varieties—some have mesh cutouts and others say 'Good American' down the leg.

On top, I wore the Making Moves Tank ($49; goodamerican.com), which is a bit of an oversized sleeveless shirt made of a lightweight fabric that's breathable and kept me cool despite all of the sweat-inducing moves we were making in class. There are also zip-ups and hoodies, all of which are fitting for any type of workout. For example, there's a wrap top that could be perfect for barre class, while the Electric Feel Crop Top ($95; goodamerican.com), a long sleeve crop top that I also tried, is perfect to pair with high-waist leggings if you want to show off your midriff…

Push-ups are a classic, zero-equipment exercise with a whole lot of perks like serious chest, shoulder, triceps, and core gains–not to mention a visibly toned upper-body. Strengthening those muscles can help decrease symptoms like back pain, poor posture, and even not-so-perky breasts. But doing the same mighty, multi-tasking exercise over and over again can get a little boring.

Luckily, push-up variations abound. “Once you’ve mastered the basic push-up, incorporating different push-up variations will help engage and strengthen different parts of your body,” says certified strength and conditioning specialist Laura Miranda, also a doctor of physical therapy and the creator of PURSUIT. Some will work your biceps or triceps more, while others will work your core and quads. “Adding variation means you’re strengthening your entire body in new ways” she says.

Below, Miranda demos five push-up variations that go way beyond the classic (and that means they’ll help sculpt your arms even faster). Whether you’re sick of standard push-ups or are just looking for new, creative ways to work your chest, triceps, shoulders, back, and core, try these moves below.

And don't be intimidated if they look challenging at first: If you’re not quite ready for these next-level moves, Miranda offers easier variations that’ll get you rocking the real thing in no time.

RELATED: 5 CrossFit Moves That Are Actually Easier to Master Than You Think

Narrow Grip Ball Push-Up

How to do it: Grip a medicine ball in front of your body in push-up position with your hands directly under your shoulders. Keeping your body in one long line and your elbows by your sides, squeeze your core and lower your body until your chest touches the medicine ball. Then, exhale as you push back to start. That’s one rep. Aim for five to 10 reps.

To make it easier: Place the ball on an incline–like on top of a bench–so that your grip is the same, but the angle of your body is different. "Doing push-ups on an incline reduces strain on your body while keeping the integrity of the movement and prepping your body for the more advanced move,” Miranda says. You can also grab a larger medicine ball. "The bigger the ball and the wider your feet, the easier this movement will be," she says.

Why it works: "This push-up variation is similar to the Chaturanga push-up that you do in yoga because you're keeping your elbows and triceps as close to your body as possible,” Miranda says. This placement puts a greater emphasis on the triceps muscles. Plus, using a medicine ball, which is less stable than a flat surface, requires you to engage your core and improves overall stability and balance.

RELATED: This 50 Push-Up Challenge Will Transform Your Body in 30 Days

The Cricket

How to do it: Start in a high plank position with your hands flat on the floor about shoulder-width apart, wrists stacked under shoulders…

The craze — which incorporates a choreographed dance to Drake’s hit song, “In My Feelings” — has gone viral since late June as celebrities like Ciara popularized it over social media.

But the innocent challenge soon turned dangerous when thousands of people began to record themselves hopping outside of moving cars and performing the dance as the vehicles travel down the road.

Videos of the risky dance have been viewed hundreds of thousands of times on Instagram and YouTube.

Worden told WQAD that she decided to participate in the trend as she drove around with friends near her home in Bettendorf, Iowa, on July 23.

“We were over by the round-about, and I thought it would be a fun idea to do the ‘Kiki Challenge,’ ” she told the news station.

But Worden, a lifelong dancer, was quickly knocked unconscious after stepping outside of the car.

“I tried, and the last thing I remember was opening the door,” she told WQAD. “So apparently I got out and tripped and fell and hit my head.”

Emergency personnel transported Worden to a nearby hospital, where she was then airlifted to the intensive care unit in Iowa City. Doctors determined that the young woman had fractured her skull, and was experiencing blood clots in her ear and bleeding in her brain, WQAD reported.

“I had five minutes to give her a kiss and not know what was going to happen,” Worden’s father, Mike Worden, told the outlet. “I will always remember that.”

After regaining consciousness in the ICU, Worden reflected on what led her to the hospital.

“That’s when it hit me like ‘Wow, I’m actually in the University of Iowa hospitals because I tried to do some little challenge everyone’s doing now,’ ” she said, “and I’m the one that got majorly hurt.”

Of the thousands of Kiki Challenge videos that have been posted, there is a growing subset of videos that show failed attempts at the dance, which include cars crashing into poles and being hit by other vehicles. In short, many things can go wrong in those few seconds that it takes to do the dance, and police around the country have warned against participating in the challenge as injuries continue to mount.

“We have some thoughts about the #InMyFeelings challenge. #Distraction in any mode is dangerous & can be deadly. Whether you are a #driver, #pilot, or #operator, focus on safely operating your vehicle,” the National Transportation Safety Board tweeted.

Worden is re-learning how to walk, and is now warning others about the risks they take when jumping outside of a slowly moving car.

“Be more careful about the challenges and fads that are going around,” she told WQAD…