TETSUBarbell Seated Close-Grip Concentration Curl vs Machine Bicep Curl
The Barbell Seated Close-Grip Concentration Curl and the Machine Bicep Curl both train the biceps as their primary muscle. The Barbell Seated Close-Grip Concentration Curl uses a barbell while the Machine Bicep Curl uses a machine. Here is how they compare and when to pick each.
Side-by-side comparison
| Barbell Seated Close-Grip Concentration Curl | Machine Bicep Curl | |
|---|---|---|
| Primary muscle | biceps | biceps |
| Body part | upper arms | upper arms |
| Supporting muscles | forearms | forearms |
| Equipment | barbell | machine |
| Steps in our guide | 5 | 6 |
How each one starts
Barbell Seated Close-Grip Concentration Curl — first steps
- Sit on a bench with your feet flat on the floor and hold a barbell with an underhand grip, hands shoulder-width apart.
- Rest your upper arms against your inner thighs, just above your knees, and let the barbell hang down in front of you.
Machine Bicep Curl — first steps
- Adjust the seat height and position yourself on the machine with your back against the pad.
- Grasp the handles with an underhand grip, palms facing up, and keep your elbows close to your sides.
Full step-by-step guides are linked below.
Which should you choose?
The Barbell Seated Close-Grip Concentration Curl lets you load the heaviest weights and progress in small, steady jumps. The Machine Bicep Curl fixes the movement path so you can push close to failure with less skill 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 biceps adapting.
Full form guides
Common questions
Is the Barbell Seated Close-Grip Concentration Curl better than the Machine Bicep Curl?
Neither is universally better — both train the biceps as the primary mover. The Barbell Seated Close-Grip Concentration Curl lets you load the heaviest weights and progress in small, steady jumps, while the Machine Bicep Curl fixes the movement path so you can push close to failure with less skill demand. Choose based on your equipment and which movement you can progress consistently.
Can I do both the Barbell Seated Close-Grip Concentration Curl and the Machine Bicep Curl in the same program?
Yes, but usually not in the same session — they overlap heavily on the biceps. 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 Seated Close-Grip Concentration Curl and the Machine Bicep Curl work the same muscles?
Yes — the primary muscle is the same (biceps) and both rely on the same supporting muscles: forearms.
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.