Your traps should be thick, imposing slabs of muscle that define your rear double bicep and rear lat spread. But if you’ve been grinding away at deadlifts and dumbbell shrugs without seeing growth, you’re probably missing an entire dimension of trap training. The fix is simpler than you think — and it’s been around since 2002.
Why Won’t My Traps Grow From Deadlifts and Rows?
Deadlifts and rows provide trap stimulus, but for many lifters, it’s not enough to drive growth. The reason comes down to how these movements actually load the traps — and where failure occurs.
In a deadlift, the traps function almost entirely as an isometric contraction. You’re holding the bar, not actively moving your scapulae through a range of motion. There’s no active contractile range for the traps to work through. That static hold can contribute to trap development, but it’s a poor primary growth stimulus for a muscle that needs dynamic contractions.
Rows are better — the scapulae do move through retraction and protraction, which directly involves the traps. But here’s the problem:
- Your arms fail before your traps do. Biceps, forearms, and rear delts often hit their failure point well before the traps are adequately fatigued.
- Some lifters never actually retract. If you’re pulling with your arms and never driving your shoulder blades together, your traps get almost zero direct work.
- The stimulus-to-fatigue ratio is poor. You might be training traps at 3-4 reps from failure while your arms are at true failure — and for some people, that gap is too large to drive adaptation.
For lifters with genetically responsive traps, the indirect stimulus from compound pulling is more than enough. For everyone else, direct trap work is non-negotiable.
What Does the Trap Muscle Actually Do?
The trapezius is a three-part muscle that retracts, elevates, and depresses the scapula. Understanding its anatomy is the key to training it completely.
The trap has three distinct fiber regions:
- Upper traps — Elevate the scapula (shrugging motion, moving shoulders toward ears)
- Mid traps — Retract the scapula (pulling shoulder blades toward the spine)
- Lower traps — Depress and retract the scapula (pulling shoulder blades down and back)
Each region has a different fiber orientation, which means each responds best to a different line of pull. When you look at the retraction movement from the side, the arm position resembles a row — horizontal pulling trains the mid and lower fibers effectively. But a standard upward shrug only hits the upper fibers along their vertical line of pull.
There’s another layer to this. The levator scapulae, a muscle that sits underneath the traps, also functions in upward scapular elevation. So does the sternocleidomastoid in the front of the neck. When you do dumbbell shrugs, these muscles contribute significantly — meaning your traps may be getting even less stimulus than you think.
The rhomboids, which sit beneath the traps, also retract the scapula. This means horizontal pulling movements train both the traps and rhomboids simultaneously, giving you that dense, thick mid-back that shows from every angle.
Why Dumbbell Shrugs Are Not Enough for Full Trap Development
Standard dumbbell shrugs only train the very highest fibers of the upper traps. If that’s your only direct trap exercise, you’re leaving two-thirds of the muscle undertrained.
The dumbbell shrug moves the scapula in one direction: straight up. That’s elevation only. While it does load the upper trap fibers, it neglects the mid and lower portions entirely. Here’s what that means in practice:
- You build the “peak” of the trap near the neck, but not the thick slab across the mid-back
- Your rear double bicep and rear lat spread lack the density that comes from full trap development
- The levator scapulae handles a large share of the load, reducing trap-specific stimulus
- You miss the retraction component that builds that 3D back thickness
Dumbbell shrugs aren’t a bad exercise. They’re just an incomplete one. If you want traps that look thick from every angle — not just a bump next to your neck — you need a movement that includes scapular retraction.
What Is a Kelso Shrug and How Do You Perform It?
A Kelso shrug is a scapular retraction movement performed in a horizontal pulling position, targeting the mid and lower trap fibers that standard shrugs miss. The name comes from Paul Kelso, who wrote Kelso’s Book of Shrugs in 2002, originally applying these movements in powerlifting training.
Here’s how to perform a Kelso shrug on a T-bar row (the recommended setup):
- Set up on a T-bar row with your torso at roughly 90 degrees to your upper arm
- Row the weight to the top position and hold it with a slight elbow bend
- Let your scapulae protract — allow your shoulder blades to spread apart
- Retract your scapulae — squeeze your shoulder blades together as hard as possible
- Repeat for reps — focusing only on scapular movement, not elbow flexion
The slight elbow bend is important for comfort, but the arms should stay relatively fixed. All the movement comes from the scapulae moving through protraction and retraction. You’ll find you can get several more reps of Kelso shrugs after you’ve already hit failure on the full row — because your arm muscles were the limiting factor, not your traps.
Best Angles for Kelso Shrugs
The angle between your torso and upper arm determines which trap fibers get the most work:
- 90 degrees (T-bar row position) — Best for mid traps and overall trap development
- 45 degrees (incline or leaning-back seated cable row) — Targets the region between upper and mid traps
- Upper back variations (row into shrug) — Hits upper and mid trap fibers together
A seated cable row with a slight lean-back is an excellent variation. Many back machines also work well, particularly those that position the upper arm at about 45 degrees to the torso. The key is finding a setup where you can isolate scapular retraction without arm involvement limiting the set.
How to Program Kelso Shrugs for Trap Growth
Start with 3 sets per session and build to 6 sets twice per week for a total of 12 weekly sets of direct trap work. This is on top of your existing back training volume.
Here’s a practical programming approach:
Option 1: Tag Onto Row Work
- Perform your rows to failure
- Immediately transition to Kelso shrugs on the same machine
- Complete 3 sets of scapular retraction reps
- This is the simplest integration and requires no extra equipment
Option 2: Standalone Trap Movement
- Perform Kelso shrugs as your dedicated shrug pattern in the session
- Place them after your main back work
- Use a T-bar row or seated cable row for the movement
Option 3: Priority Placement
- If back is a weak point, put your row-to-Kelso-shrug combo as the first lift of the session
- Training a lagging muscle group when you’re freshest maximizes stimulus quality
Volume Progression Over 8 Weeks
| Week | Session 1 | Session 2 | Weekly Total |
|---|---|---|---|
| 1-4 | 3 sets | 3 sets | 6 sets |
| 5-8 | 4-6 sets | 4-6 sets | 8-12 sets |
Assess recovery after the first 8 weeks. If you’re handling the volume well and recovering between sessions, you can increase toward 6 sets per session. If joints or recovery are compromised, hold at the lower end.
For a two-session-per-week back training split:
- Session 1: Lat-focused work first, then trap work (Kelso shrugs)
- Session 2: Trap work first, then lat-focused work
This rotation ensures both muscle groups get priority placement across the training week.
How Many Sets Per Week Do Traps Need to Grow?
Most lifters need 6-12 direct sets per week on top of their existing pulling volume to see meaningful trap growth. This assumes your rows and deadlifts are already providing some baseline stimulus.
Key programming principles for trap development:
- Start conservative. 6 total weekly sets of direct trap work is enough to assess response over 4-8 weeks.
- Track your recovery. Traps are involved in virtually every upper body pulling movement, so accumulated fatigue can sneak up.
- Prioritize retraction over elevation. If you’re only going to pick one direct trap exercise, make it a Kelso shrug, not a dumbbell shrug.
- Use failure as your guide. Kelso shrugs done after rows naturally take you closer to true trap failure, which is exactly the stimulus you’ve been missing.
Frequently Asked Questions
Can I Do Kelso Shrugs Without a T-Bar Row?
Yes — any machine or cable setup that allows horizontal scapular retraction works. A seated cable row is the most common alternative. Chest-supported row machines, plate-loaded row machines, and even a barbell bent-over position can work. The key requirement is that your torso is positioned so the line of pull allows your scapulae to move through full retraction and protraction while your arms remain relatively fixed.
Should I Replace Dumbbell Shrugs With Kelso Shrugs?
If you can only do one shrug variation, Kelso shrugs are the better choice for complete trap development. Dumbbell shrugs only target the uppermost fibers, while Kelso shrugs hit the mid and lower regions that create genuine back thickness. That said, there’s no reason you can’t include both — use Kelso shrugs as your primary trap movement and add dumbbell shrugs if you want additional upper trap volume.
If your traps have been a stubborn body part, the issue likely isn’t effort — it’s exercise selection. Swap in Kelso shrugs, start with conservative volume, and give it 8 weeks. Track your sets and progression with a tool like Splitt to make sure you’re actually hitting your volume targets week over week.