TETSUBarbell Wrist Curl vs Dumbbell Lying Supination On Floor
The Barbell Wrist Curl and the Dumbbell Lying Supination On Floor both train the forearms as their primary muscle. The Barbell Wrist Curl uses a barbell while the Dumbbell Lying Supination On Floor uses a dumbbell. Here is how they compare and when to pick each.
Side-by-side comparison
| Barbell Wrist Curl | Dumbbell Lying Supination On Floor | |
|---|---|---|
| Primary muscle | forearms | forearms |
| Body part | lower arms | lower arms |
| Supporting muscles | biceps and brachialis | biceps and shoulders |
| Equipment | barbell | dumbbell |
| Steps in our guide | 5 | 5 |
How each one starts
Barbell Wrist Curl — first steps
- Sit on a bench with your feet flat on the ground and your forearms resting on your thighs, holding a barbell with an underhand grip.
- Allow the barbell to roll down to your fingertips, keeping your wrists straight.
Dumbbell Lying Supination On Floor — first steps
- Lie flat on your back on the floor with your legs extended and your arms by your sides, holding a dumbbell in each hand.
- Rotate your palms to face up, keeping your elbows close to your sides.
Full step-by-step guides are linked below.
Which should you choose?
The Barbell Wrist Curl lets you load the heaviest weights and progress in small, steady jumps. The Dumbbell Lying Supination On Floor works each side independently and demands more stabilizer control. 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 forearms adapting.
Full form guides
Common questions
Is the Barbell Wrist Curl better than the Dumbbell Lying Supination On Floor?
Neither is universally better — both train the forearms as the primary mover. The Barbell Wrist Curl lets you load the heaviest weights and progress in small, steady jumps, while the Dumbbell Lying Supination On Floor works each side independently and demands more stabilizer control. Choose based on your equipment and which movement you can progress consistently.
Can I do both the Barbell Wrist Curl and the Dumbbell Lying Supination On Floor in the same program?
Yes, but usually not in the same session — they overlap heavily on the forearms. 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 Wrist Curl and the Dumbbell Lying Supination On Floor work the same muscles?
The primary muscle is the same: the forearms. Supporting muscles differ slightly — biceps and brachialis for the Barbell Wrist Curl versus biceps and shoulders for the Dumbbell Lying Supination On Floor.
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.