Dumbbell Single Arm Preacher Curl exercise animation (Mujer)

Dumbbell Single Arm Preacher Curl

Músculo objetivo
Brachialis
Músculos sinergistas
Biceps Brachii, Brachioradialis
Equipamiento
Dumbbell
Parte del cuerpo
Upper Arms
Tipo
Strength

The dumbbell single arm preacher curl is an isolation exercise that primarily targets the brachialis, with the biceps brachii and brachioradialis assisting. Performed one arm at a time over a preacher bench, the angled pad pins your upper arm in place so you can't swing or cheat — making it ideal for building thicker, fuller upper arms and ironing out side-to-side strength imbalances.

Cómo hacer el Dumbbell Single Arm Preacher Curl

  1. 1Set the preacher bench so the top of the pad sits just under your armpit. Pick up a dumbbell in one hand with an underhand (palm-up) grip.
  2. 2Sit down and lay the back of your working upper arm flat against the pad, keeping your armpit snug to the top edge.
  3. 3Let the arm extend until your elbow is nearly straight, feeling a stretch in the biceps, with the dumbbell held in a controlled position.
  4. 4Keep your chest up, brace your core, and rest your non-working hand on the bench or your thigh for stability.
  5. 5Curl the dumbbell upward by bending only at the elbow, keeping your upper arm pressed into the pad throughout.
  6. 6Squeeze the muscle at the top, stopping just before the forearm reaches vertical so tension stays on the arm.
  7. 7Lower the dumbbell slowly under control until your elbow is nearly straight again, resisting the weight the whole way down.
  8. 8Finish all reps on one arm, then switch the dumbbell to the other hand and repeat for an equal number of reps.

Consejos de técnica

  • Use a 2–3 second lowering tempo and avoid locking the elbow out hard at the bottom to protect the joint while maximizing the stretch.
  • Keep your wrist neutral and firm rather than letting it bend backward, so the load drives the elbow flexors instead of the forearm.
  • Start lighter than you would on a standing curl — the preacher pad removes momentum, so the bottom portion of the rep is much harder.
  • Keep your shoulder down and relaxed; if it rolls forward to help lift, the weight is too heavy.

Errores comunes

  • Lifting the upper arm off the pad to swing the weight up, which shifts work to the shoulders and defeats the strict isolation the bench provides.
  • Bouncing out of the bottom or dropping the dumbbell quickly, which strains the elbow tendons at full stretch and wastes the eccentric.
  • Using too much weight and shrugging or leaning back to finish reps, which loses tension on the target muscle and risks the lower back.
  • Cutting the range short at the bottom by not extending the elbow, which trades the deep stretch for a shorter, less effective rep.

Preguntas frecuentes

What muscles does the dumbbell single arm preacher curl work?

It primarily targets the brachialis, the muscle that sits under the biceps and adds thickness to the upper arm, with the biceps brachii and brachioradialis assisting.

Why do it one arm at a time instead of both?

Working one arm lets you focus fully on each side, fix strength imbalances, and brace your body with the free hand so the working arm does all the lifting.

How many sets and reps should I do?

As an isolation move, 3–4 sets of 8–12 reps per arm works well. Use a controlled tempo with a weight that makes the last couple of reps challenging.

Is the dumbbell single arm preacher curl good for beginners?

Yes. The preacher pad fixes your upper arm in place, which removes swinging and teaches strict form, making it a beginner-friendly way to learn elbow flexion.

Should I fully straighten my arm at the bottom?

Extend until the elbow is nearly straight to get a full stretch, but stop just short of a hard lockout to keep tension on the muscle and spare the elbow tendons.

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