Stop Skipping Lockout: The One Muscle Dips Build That the Bench Press Can’t

You’ve probably done dips a thousand times. They’re that movement you tack onto the end of arm day or sprinkle into a chest workout like an afterthought. But here’s what nobody talks about-the real benefit of dips isn’t just a bigger chest or thicker triceps. It’s a muscle that sits quietly on the side of your ribcage, waiting for you to actually finish a rep. That muscle is the serratus anterior. And once you learn how to fire it, you’ll wonder why you ever relied on bench pressing to build shoulders that actually work.

I’ve spent years digging through strength research, tweaking my own training, and watching athletes struggle with shoulders that look strong but fold under real load. The problem almost always circles back to the same thing: a weak serratus. Dips solve that faster than any other pressing movement. But first, you have to stop cutting your lockout short.

The Power Players You Already Know About

Let’s get the obvious ones out of the way. Dips demolish your triceps, chest, and front delts-that’s not breaking news. But understanding how they do it sets the stage for why the serratus deserves the headline.

Triceps brachii: A dip is basically a bodyweight close-grip press turned vertical. All three heads of the triceps fire to straighten the elbow, and the long head-because it crosses the shoulder joint-gets pulled into the action even harder. On a straight-bar dip station like the BULLBAR, your hands stay fixed, so your triceps have to produce force without the crutch of rotating your grip into a stronger leverage point. That builds honest, straight-arm pressing power.

Pectoralis major: Lean forward a few degrees and your chest takes over the movement. The sternal fibers-the lower pec-are prime movers here, especially at the bottom. Research consistently puts dip activation for the chest right up there with the bench press. But here’s the twist: your shoulder blades aren’t pinned to a bench. They’re free. And that’s where things get interesting.

Anterior deltoid: The front delt helps out with shoulder flexion and some stabilization. It’s not the star, but it’s pulling its weight. The delt’s main gig is keeping your humeral head centered while the bigger muscles move the load.

That’s the standard rundown. Most articles stop there, drop in a “core works too,” and move on. But skipping the lockout means skipping the muscle that actually glues your shoulder together.

The Serratus Anterior: Your Shoulder’s Anchor

The serratus anterior starts on your upper ribs-usually ribs one through eight or nine-and wraps around your torso, inserting along the inner edge of your shoulder blade. Think of it as a set of meaty fingers that pull your scapula forward and press it flat against your ribcage. When you throw a punch, reach overhead, or push a stalled car, that muscle fires before anything else. It’s the stabilizer that makes everything else possible.

Now, here’s why dips are a cheat code for it. At the top of a well-executed rep, when your elbows lock out and you push your shoulders down and forward into full protraction, the serratus gets a maximal contraction against your entire body weight. A bench press can’t touch this-your shoulder blades are jammed against a pad, so any protraction is basically a shrug that nobody actually trains. Push-ups? Sure, but with a fraction of the load. Overhead presses? The shoulder blade moves up and rotates, which is serratus work, but it’s a different kind of demand. Dips give you heavy vertical loading with a scapula that’s free to move, forcing the serratus to stabilize through the entire range and then explode into the lockout.

When that muscle gets lazy, you’ll see scapular winging-shoulder blades sticking out like chicken wings-and a string of problems: a weaker overhead lockout, sketchy shoulder stability under load, and a higher chance of nagging impingement. I’ve seen it in lifters who can bench twice their body weight but can’t hold a solid top position on a dip without their shoulders creeping up to their ears. Your bench press might be impressive, but it’s not building the foundation your joints need for durability.

Don’t Trust Me-Look at the Research

You don’t need an EMG machine to feel your serratus screaming after a few strict dip sets. But the data is there to back it up. Studies on the push-up plus-a push-up where you add an exaggerated protraction at the top-show massive serratus activation. A dip is essentially a loaded, vertical push-up plus. When researchers have put pressing exercises head-to-head, dips consistently outpace the bench press and flyes for serratus engagement, especially at the end range. That lockout you rush through? That’s the money position.

Athletes who rely on a steady diet of supine pressing-bench, dumbbell press, floor press-often develop a strength imbalance. The muscles that move the arm get strong, but the stabilizers that control the shoulder blade lag behind. Dips close that gap by forcing the entire chain to work together, from ribcage to fist.

How to Actually Fire Your Serratus During Dips

Slapping out a bunch of half-reps won’t cut it. The magic happens at the top-but only if you commit to it.

• Own the lockout. At the top, don’t just straighten your arms. Push your shoulders down and forward-think about driving the bars through the floor and rounding your upper back slightly. Your shoulder blades should wrap around your ribs. Hold that position for a beat before you descend. That split-second pause is where the serratus gets its best work.
• Stop shrugging. If your shoulders creep toward your ears during a dip, you’re compensating for weak triceps or poor scapular control. Cue “shoulders away from your ears” from start to finish. Can’t maintain it? Regress: use a band for assistance or do top-position holds to build endurance.
• Angle matters less than lockout. A more upright torso hammers the triceps; leaning forward shifts the load to the chest. But both versions allow full serratus protraction if you finish the rep. Don’t overthink the lean-focus on finishing. A stable, freestanding pull-up bar and dip station like the BULLBAR 2.0 gives you the open portal design to move naturally without a center post jamming your rhythm.

Bench Press vs. Dips: The Freedom Argument

Bench pressing is a powerhouse for building raw strength. I’m not telling you to ditch it. But it’s a one-dimensional shoulder builder. When your back and scapulae are pinned to the bench, the serratus sits on the bench next to you. You press, the pecs and delts and triceps do the job, and the shoulder blade stays pretty static. Over months and years, if all your pressing happens in that locked-down position, you develop a gap between the muscles that move the arm and the muscles that control the shoulder blade.

Dips fill that gap beautifully. They teach your shoulders to press hard while your scapulae stay mobile and find stability through sheer muscular effort-not a padded bench. That carries over to anything you do standing up: a strict overhead press, a heavy sled push, defensive lineman drills, or just hoisting a kid over your head. Real-world strength doesn’t happen lying down. Dips build the overhead and pressing integrity you can’t get from a bench alone.

The Core and Grip Bonus

Beyond the serratus, dips demand full-body tension. Gripping the bars hard fires up your forearm flexors and teaches your nervous system to create tension from the hands up. Your core-rectus abdominis, obliques, deep spinal stabilizers-has to lock in to keep your lower body from turning into a pendulum. On a shaky doorway bar, you’re wasting energy just staying upright. On a solid, freestanding setup built from 16-gauge industrial steel and rated for 400 pounds, you can direct every ounce of that stability into the muscles you’re trying to train.

That “stability tax” isn’t a flaw-it’s a feature. You’re building anti-extension and anti-rotation strength without doing a single plank. For the minimalist who can’t fit a full rack, the dip station doubles as a core tool and grip builder, no extra equipment required.

How to Actually Program Dips (Without Wrecking Your Shoulders)

Dips demand respect. You wouldn’t max out on bench press every day, and you shouldn’t treat dips like an afterthought. Here’s how to make them a staple without paying for it with cranky shoulders.

• Master the move first. If five strict dips with full lockout and a controlled descent aren’t there yet, use a band for assistance or stick to slow, five-second negatives. The BULLBAR’s built-in resistance band anchors make this dead simple-no need to rig bands under your knees or chase stability while you learn.
• Put them early in your session. Train dips when you’re fresh, not after eight sets of pressing. Your serratus and triceps need to be sharp to learn the pattern and generate clean reps. Bury them at the end and you’ll only grind out ugly half-reps.
• Volume and progression. Three to four sets of five to ten strict reps is a solid range for most people. When bodyweight dips climb above fifteen clean reps, add load with a dip belt. The frame is tested past 1,200 rep cycles at 400 pounds-it can handle your weighted reps, just don’t treat it like a jungle gym.
• Balance with pulling. For every set of dips, match it with rows or face pulls. The serratus works best when your upper back is strong, not neglected. Balanced training keeps your shoulders durable and ready to train for years.
• Give it time. You weren’t built in a day. The BULLBAR ships with a 100-day risk-free trial, not just so you can test the gear, but so you can see what consistent dip work actually does to your upper body. Pair it with the free 20-Day Foundational Strength Program that comes with your purchase, and you’ve got a roadmap instead of just a piece of equipment.

Lock Out Every Rep

Dips have been a staple for decades-in boxing gyms, military prep camps, and garage setups-because they demand honesty. You can’t fake a lockout. You either push all the way up, your serratus fires, and your shoulders get stronger and more resilient, or you don’t. The bench press has its place, but it’s not a shoulder bank you can withdraw stability from later. You have to earn that through movements that let your scapulae move free.

The next time you step up to the dip bars, stop counting reps and start finishing them. Drive into the top position, own it, and let that serratus do its job. Your shoulders will thank you, and your pressing numbers-bench included-will follow.

The BULLBAR 2.0 is a freestanding pull-up bar and dip station that sets up in under a minute, folds flat to 45 by 13 by 11 inches, and gives you an open portal design for unrestricted dips, pull-ups, and over 100 exercises. No walls, no drilling, no excuses. Try it risk-free for 100 days with free U.S. shipping and a lifetime limited warranty.