Bench Dumbbell Forearm Supination
In SetGrip: Dumbbell Forearm Supination (Bench)
Lying chest-down with arms hanging turns supination into a strict drill, because the bench stops the shoulder rotation that usually fakes this movement when standing. Rotating palm-up against an off-center dumbbell hits the supinators and biceps in their twisting role rather than their curling role. Pair it with the pronation version off the same bench.
How to do the Bench Dumbbell Forearm Supination
- Lie flat on a bench with your feet flat on the ground.
- Hold a dumbbell in each hand with your palms facing up and your arms fully extended.
- Keeping your upper arms stationary, curl the dumbbells towards your shoulders by contracting your forearms.
- Pause for a moment at the top, then slowly lower the dumbbells back to the starting position.
- Repeat for the desired number of repetitions.
Tip: Use high reps, 15 to 25, and a light weight you can move through the full range with control.
Muscles worked
Common mistakes
- Moving the elbow — the forearm should rest on the bench or your thigh and only the hand should turn; if the elbow lifts, you are using the biceps.
- Rushing through the range — go slowly and pause at each end so the small forearm muscles do the work rather than momentum.
- Going too heavy — these movements use small muscles, so a light dumbbell or plate is plenty; the goal is a burn, not a max.
- Bar rolling off the fingertips — on finger curls let it go to the second knuckle and no further, then curl it back into the palm.
Sets, reps and where it fits
| Goal | Sets × reps | Rest |
|---|---|---|
| Muscle growth | 3–4 × 10–15 | 60–90 s |
| Endurance / finisher | 2–3 × 15–20 | 45 s |
| Strength | Not ideal — pick a compound lift for the same muscle | — |
Forearm work goes at the very end of a session after all gripping is done. Superset finger curls with reverse wrist curls using the same bar.
Variations and alternatives
Frequently asked questions
What muscles does the Bench Dumbbell Forearm Supination work?
The Bench Dumbbell Forearm Supination primarily works the forearms. It also involves the biceps and delts, which assist the movement and stabilise the joints.
Is the Bench Dumbbell Forearm Supination good for beginners?
Yes. The Bench Dumbbell Forearm Supination is rated beginner: it uses a dumbbell and the movement is simple to learn. Start light, focus on the full range of motion and add load once every rep looks the same.
What can I do instead of the Bench Dumbbell Forearm Supination?
If you cannot do the Bench Dumbbell Forearm Supination, try the Floor Dumbbell Forearm Supination, the Bench Dumbbell Forearm Pronation or the Single Arm Dumbbell Forearm Rotation. Each of them trains the forearms through a similar movement, so you can swap them in without changing the rest of the workout.
How many sets and reps should I do?
It depends on your goal. For the Bench Dumbbell Forearm Supination, a sensible starting point is muscle growth: 3–4 × 10–15 with 60–90 s rest; endurance / finisher: 2–3 × 15–20 with 45 s rest. Do it after your compound lifts. It is a finishing movement, not the main event.
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