Chest training is so important to a certain type of gym bro that they'll dedicate every single Monday to the endeavor, posting up at bench press stations around the nation to pump through round after round of reps to build a barrel shape at the top of their torso. For far too many of these trainees, however, their International Chest Day exploits start and end with that bench press session. They might be focused on the number of plates on the bar, but unless they have a powerlifting competition in their sights, they should be even more fixated on the muscle contraction at the top of the lift. That's where they'll have the most success in building their chest muscles, and there are other exercises, like the bench dumbbell fly, that will be much more effective for targeted growth.

The goal of the dumbbell fly is to move in a slightly different way that you do during other chest-focused exercises like presses. When you perform a fly, you adduct the chest muscle, which means squeezing the pecs to move your arms inward toward the midline of your body. That squeeze will be the key to growth, helping to develop the inner chest muscle to finish out the shape of your pecs.

There's more to the bench dumbbell chest fly than just kicking back on the bench and flapping away with a set of dumbbells in each hand. Check out this guidance from Men's Health fitness director Ebenezer Samuel, C.S.C.S. and fitness editor Brett Williams to find out how you can fit the fly into your workouts—or if there might be a better way for you to build up that chest.

Benefits—and Drawbacks—of the Bench Dumbbell Chest Fly

Again, the bench dumbbell chest fly allows you to add some chest adduction to your training plan. This squeeze can be the key to muscle growth, most specifically helping to target the inner part of the chest, which isn't as much a focus on pressing movements.

That said, the bench dumbbell chest fly might not be the best option for you to work that chest adduction into your routine. The exercise can be riskier and less effective than other exercises—when you put your shoulder joints under so much stress, you're putting your long-term health at risk. Before adding the dumbbell chest fly to your routine, consider what alternatives you might try first.

How to Do the Bench Dumbbell Fly

Follow these form cues to learn how to do the bench dumbbell fly. Once you've read the step-by-step directions, follow along for some higher-level tips from Samuel to dive deeper into the exercise.

●Lie back on the bench, then press the dumbbells up above your chest with a neutral grip.

●Drive your shoulder blades back into the bench to set your shoulders. Keep your feet on the ground and squeeze your glutes and abs to create full-body tension.

●Move your hands to turn your pinkies toward each other. This will help to create some external rotation at the shoulder joints.

●Bend your elbows slightly, then lower the weights down to the sides, moving only at the shoulders. Lower down only to a comfortable point for your range of motion, when you feel a stretch on your chest.

●Squeeze your pecs to raise the weights back up to the starting position. Don't slam the weights together at the top—instead, stop with the weights just slightly apart, continuing to squeeze the chest.

●Perform 3 sets of 10 to 12 reps

Squeeze at the Top

Eb says: The true benefit and magic of the dumbbell fly happens not when your arms are at their widest, but when you bring your arms together. It's here that you get the chance to squeeze your pectoral fibers and really promote chest growth. Focus on this squeeze, thinking of lingering at the top for a good one second to get the most out of the fly.

Avoid touching the dumbbells at the top, too, because doing so removes that chance to really squeeze your pecs. Just as importantly, if you're driving the dumbbells up so quickly that they're clanking together, you're doing the motion without the precision and control required to really get that chest squeeze. Take your time with each rep.

Never Lower Too Deep

Eb says: Remember: The magic of the fly occurs at the top of the movement, not the bottom. So don't try too hard to overstretch your pecs by lowering your shoulders extra-deep.

Aim to get your upper arms parallel with the ground, but don't worry about going too deep on them. This isn't an exercise for flexibility; you're using the movement to build size, strength, and definition. And not every person has perfect shoulder range of motion, especially if you work a desk job. So lower the dumbbells only until you feel a slight stretch in your chest; if you feel this in your shoulders or biceps, you're over-stretching. A good starting point: Think about lowering until your upper arms are parallel with the ground or just a few degrees deeper.

Never Stop Squeezing Your Shoulder Blades

Eb says: Start each set of dumbbell flies by driving your shoulder blades into the bench, and think about squeezing them as you lower the weights. This will help protect your shoulders. As you begin to fly up, though, continue to squeeze your shoulder blades together. This does two things. First off, it will once again help you protect your shoulders. It's really easy to compromise joint space in the shoulder as you fly up, giving your rotator cuff tendons less space to move. By squeezing your shoulder blades, you help maintain that.

Even better, if you continue to squeeze your shoulder blades together when you finish the dumbbell fly, you'll challenge your chest to really squeeze at the top of each rep. The difference is subtle: If you release your shoulder blades, you can essentially bring the entire shoulder complex along for the ride at the top of the rep.

But if you keep squeezing hard on that rhomboid, it forces your shoulder blades to stay tight and keeps your shoulders down. That means the finishing squeeze on the dumbbell fly winds up coming purely from a pectoral contraction. Even if this feels like it cuts your range of motion, it's not actually doing so. It's simply forcing your pecs to fully work through their natural range, instead of pointlessly over-extending the movement.

Headshot of Brett Williams, NASM
Brett Williams, NASM

Brett Williams, a fitness editor at Men's Health, is a NASM-CPT certified trainer and former pro football player and tech reporter who splits his workout time between strength and conditioning training, martial arts, and running. You can find his work elsewhere at Mashable, Thrillist, and other outlets.

Headshot of Ebenezer Samuel,  C.S.C.S.

Ebenezer Samuel, C.S.C.S., is the fitness director of Men's Health and a certified trainer with more than 10 years of training experience. He's logged training time with NFL athletes and track athletes and his current training regimen includes weight training, HIIT conditioning, and yoga. Before joining Men's Health in 2017, he served as a sports columnist and tech columnist for the New York Daily News.