How to Do Dumbbell Lying Supination
Quick facts
| Primary muscle | Forearms |
|---|---|
| Secondary muscles | — |
| Equipment | Dumbbell |
| Category | Strength |
How to perform Dumbbell Lying Supination
- Lie sideways on a flat bench with one arm holding a dumbbell and the other hand on top of the bench folded so that you can rest your head on it.
- Bend the elbows of the arm holding the dumbbell so that it creates a 90-degree angle between the upper arm and the forearm.
- Now raise the upper arm so that the forearm is parallel to the floor and perpendicular to your torso (Tip: So the forearm will be directly in front of you). The upper arm will be stationary by your torso and should be parallel to the floor (aligned with your torso at all times). This will be your starting position.
- As you breathe out, externally rotate your forearm so that the dumbbell is lifted up in a semicircle motion as you maintain the 90 degree angle bend between the upper arms and the forearm. You will continue this external rotation until the forearm is perpendicular to the floor and the torso pointing towards the ceiling. At this point you will hold the contraction for a second.
- As you breathe in, slowly go back to the starting position.
- Repeat for the recommended amount of repetitions and then switch to the other arm.
Muscles worked
- Forearms (primary): controls your grip and keeps the wrist steady under load.
Sets & reps by goal
| Goal | Sets × reps | Load | Rest |
|---|---|---|---|
| Strength | 3–5 × 3–5 | Heavy (~85%+) | 2–3 min |
| Hypertrophy | 3–4 × 8–12 | Moderate (~65–75%) | 60–90 s |
| Endurance | 2–3 × 15–20 | Lighter (~50–60%) | 30–45 s |
Pick the row that matches your goal. If you're newer, anchor in the hypertrophy range while you groove the form.
Form tips
- Move slowly and let the wrist travel through its full range instead of bouncing at the ends.
- Each side works on its own, so match the depth and speed of both arms and don't let the stronger side take over.
- Treat every rep the same — a repeatable setup and bar path is what lets you add weight safely over time.
- Control the lowering phase — a 2–3 second descent builds more than dropping the weight.
Common mistakes
- Loading so heavy the wrist collapses instead of moving through a clean range.
- Letting the dumbbells drift apart or clang together at the top instead of controlling the path.
- Chasing weight jumps before the current load feels solid on every rep.
Frequently asked questions
What muscles does Dumbbell Lying Supination work?
Dumbbell Lying Supination is a focused movement that primarily works the forearms.
What equipment do I need for Dumbbell Lying Supination?
Dumbbell Lying Supination needs a pair of dumbbells.
How many sets and reps should I do for Dumbbell Lying Supination?
It depends on your goal: about 3–5 sets of 3–5 heavy reps for strength, 3–4 sets of 8–12 for muscle growth, or 2–3 sets of 15–20 for endurance. Pick the row that matches your goal. If you're newer, anchor in the hypertrophy range while you groove the form.
Train Dumbbell Lying Supination with a coach in your pocket
Gimmy is your AI gym buddy — it programs Dumbbell Lying Supination into recovery-aware workouts, tracks your sets, and shows one score that tells you if it's working.
Get early access