TETSUBarbell Thruster vs Kettlebell Pirate Supper Legs
The Barbell Thruster and the Kettlebell Pirate Supper Legs both train the delts as their primary muscle. The Barbell Thruster uses a barbell while the Kettlebell Pirate Supper Legs uses a kettlebell. Here is how they compare and when to pick each.
Side-by-side comparison
| Barbell Thruster | Kettlebell Pirate Supper Legs | |
|---|---|---|
| Primary muscle | delts | delts |
| Body part | shoulders | shoulders |
| Supporting muscles | quadriceps, glutes, hamstrings and core | triceps and forearms |
| Equipment | barbell | kettlebell |
| Steps in our guide | 5 | 6 |
How each one starts
Barbell Thruster — first steps
- Start by standing with your feet shoulder-width apart, holding a barbell at shoulder height with an overhand grip.
- Lower into a squat position by bending your knees and pushing your hips back.
Kettlebell Pirate Supper Legs — first steps
- Stand with your feet shoulder-width apart, holding a kettlebell in one hand.
- Bend your knees slightly and hinge forward at the hips, keeping your back straight.
Full step-by-step guides are linked below.
Which should you choose?
The Barbell Thruster lets you load the heaviest weights and progress in small, steady jumps. The Kettlebell Pirate Supper Legs shifts the load off-center, adding grip and stabilizer demand. If your gym has both options, neither is a wrong choice: pick the one that feels strongest through a full range, and swap after 6 to 8 weeks to keep the delts adapting.
Full form guides
Common questions
Is the Barbell Thruster better than the Kettlebell Pirate Supper Legs?
Neither is universally better — both train the delts as the primary mover. The Barbell Thruster lets you load the heaviest weights and progress in small, steady jumps, while the Kettlebell Pirate Supper Legs shifts the load off-center, adding grip and stabilizer demand. Choose based on your equipment and which movement you can progress consistently.
Can I do both the Barbell Thruster and the Kettlebell Pirate Supper Legs in the same program?
Yes, but usually not in the same session — they overlap heavily on the delts. A common setup is one as your main movement and the other on a second training day, or alternating them block by block.
Do the Barbell Thruster and the Kettlebell Pirate Supper Legs work the same muscles?
The primary muscle is the same: the delts. Supporting muscles differ slightly — quadriceps, glutes, hamstrings and core for the Barbell Thruster versus triceps and forearms for the Kettlebell Pirate Supper Legs.
Track it in Tetsu
Tetsu tracks both movements separately, keeps your PRs per exercise, and tells you which one is actually progressing. Free to start.