We've Collectively Been Fitness Instructors for 32 Years—Here's What We Look for in a Sports Bra

When it comes to finding the perfect sports bra, few people know the ropes better than seasoned fitness instructors. I recently had the chance to talk to a group of experts from Equinox, each with years of experience and a rigorous schedule that puts activewear to the ultimate test. They've tried countless styles, and they know firsthand which sports bras perform best through intense workouts, long days, and everything in between. According to them, the ideal sports bra is more than just supportive; it should be as comfortable in a high-energy class as it is during a low-key stretch.

What really matters? For these trainers, it's all about a bra that stays secure without feeling restrictive, fabrics that breathe and wick sweat, and straps that don't budge—even during the most challenging moves. They also emphasized details like thoughtful construction, from soft seams to supportive bands that don't dig in. Whether you're a regular at the gym or just starting your fitness journey, these insights are a gold mine for finding a sports bra that actually supports you. Here's what Equinox's fitness instructors recommend, plus a few top picks that have made the cut.

How long have you been a trainer or fitness instructor?

Ten years.

What are your areas of expertise in the fitness space?

Boxing, HIIT, and strength.

Can you name the one nonnegotiable for you when shopping for a sports bra to wear while working out?

I am a New Yorker in the sense that my leggings are basic and black always, so my nonnegotiable for shopping for a sports bra is always finding a stylish bra. I let my personality shine a bit more through my sports bra.

What are common mistakes people make when shopping for a sports bra for their workouts?

The most common mistake is that people don't consider the type of workout they are doing. For high-impact workouts, you need to make sure you're buying a sports bra with maximum sport. Look for adjustable straps, wider bands, and something that fits super secure. For lower-impact workouts like yoga or Pilates, you can be more flexible with your options. You can opt for more comfortable materials and flexible fits.

Shop Hammond's picks:

How long have you been a trainer or fitness instructor?

I started my career as a personal trainer nine years ago and began teaching group fitness at Equinox nearly eight years ago.

What are your areas of expertise in the fitness space?

I teach a wide variety of formats, including cycling, running, strength and conditioning, and barre. Growing up as a dancer, barre has always been a natural fit for me. However, since joining Equinox, I've focused much of my time, energy, and education on strength training and running. I'm a two-time marathoner and a three-time Hyrox competitor.

Can you name the nonnegotiables for you when shopping for a sports bra to wear while working out?

I'm so glad you asked—I consider myself the biggest sports bra critic! With a size 4 waist and a DD cup, finding a supportive sports bra that also looks good feels nearly impossible. When I do find something that works, it usually has a few key features. Molded cups: These cradle each breast and help reduce bounce. Fully adjustable straps: My favorites offer adjustable shoulder and back straps for a customized fit. Moisture-wicking material: I sweat a lot, so having fabric that keeps me dry is a must—especially for long runs. Front zippers or easy closures: I'm not a fan of back clasps, as they can be tricky to adjust without help. Velcro options are okay, though they can be a bit finicky after laundry. Front zippers are, by far, the most convenient. Great design: DD girls deserve cute bras too! Support is nonnegotiable, but I also want to feel confident and enjoy wearing it.

What are common mistakes people make when shopping for a sports bra for their workouts?

One of the biggest mistakes is not trying the bra on. Many brands claim their bras are high-impact but fail to provide adequate support, even for low-impact workouts like barre. Testing the fit and function is as important as trying on running shoes before a race. Another common mistake is choosing a sports bra solely based on looks. I get it—I've done it too! But if you need extra lift and support, do your research. Some brands specialize in these features, and while style is important, comfort and functionality always come first. Make sure to check the recommended cup size and consumer reviews before you buy.

Shop Artzi's picks:

How long have you been a trainer or fitness instructor?

I have been in the industry for eight years instructing. I was a professional dancer prior for 15 years.

What are your areas of expertise in the fitness space?

I am certified in barre, Pilates, prenatal workouts, dance cardio, and rebounding routines, all on my platform—the Silhouette by Alexis app.

Can you name the one nonnegotiable for you when shopping for a sports bra to wear while working out?

I need bras that offer support and are not trying to push cleavage, as that is never going to support me well enough for my mobility routines and dance cardio.

What are common mistakes people make when shopping for a sports bra for their workouts?

I find some of my clients go for how it looks over how supportive it is for your breasts and your spine.

Shop Sweeney's picks:

How long have you been a trainer or fitness instructor?

I have been a fitness instructor for five years, specializing in cardio sculpt, barre, and conditioning modalities.

What are your areas of expertise in the fitness space?

I definitely lean into the rhythmic side of things with lighter-weight, high-repetition sculpt. Not only does it feel amazing on the body, but one will feel challenged as they bring smaller muscles to total fatigue.

Can you name the one nonnegotiable for you when shopping for a sports bra to wear while working out?

Over anything, I like to choose a sports bra with a flattering cut that will also be supportive for the workout I will be doing that day. For me personally, I gravitate toward halterneck sports bras—soooo flattering!

What are common mistakes people make when shopping for a sports bra for their workouts?

Often, people lose sight of functionality and just go by how the sports bra looks. However, you need to highlight both when making the important decision on what to rock and when.

Shop Diehl's picks:

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