Dumbbell Standing One Arm Extension exercise animation (Hombre)

Dumbbell Standing One Arm Extension

Músculo objetivo
Triceps Brachii
Equipamiento
Dumbbell
Parte del cuerpo
Upper Arms
Tipo
Strength

The dumbbell standing one arm extension is a single-arm overhead isolation exercise that targets the triceps brachii. Performed standing with one dumbbell held overhead and lowered behind your head, it stretches and loads the long head of the triceps through a long range of motion and lets you train each arm independently to even out side-to-side strength.

Cómo hacer el Dumbbell Standing One Arm Extension

  1. 1Stand tall with your feet shoulder-width apart and brace your core. Hold a single dumbbell in one hand and press it straight overhead until your arm is fully extended.
  2. 2Position the upper arm close to your head with the elbow pointing toward the ceiling, palm facing inward.
  3. 3Keep your upper arm still and lower the dumbbell behind your head by bending only at the elbow, until you feel a stretch in the triceps.
  4. 4Pause briefly at the bottom without letting the upper arm drift forward or the elbow flare out.
  5. 5Extend your elbow to press the dumbbell back up overhead until your arm is fully straight, squeezing the triceps at the top.
  6. 6Complete all your reps on one side, then switch the dumbbell to the other hand and repeat for an equal number of reps.
  7. 7Lower the dumbbell under control and set it down safely to finish.

Consejos de técnica

  • Use your free hand to lightly support the working elbow, keeping it pointed up and tucked in close to your head.
  • Lower the dumbbell slowly to feel the stretch on the triceps, then drive up under control rather than swinging the weight.
  • Keep your ribs down and avoid arching your lower back as you press overhead; brace your core to stay stable.
  • Start lighter than you would on a two-arm or barbell triceps extension, since a single arm overhead is harder to stabilize.

Errores comunes

  • Letting the elbow flare out to the side, which shifts the work off the triceps and stresses the shoulder.
  • Moving the whole upper arm instead of bending only at the elbow, which turns the lift into a shoulder press and cuts triceps tension.
  • Arching the lower back to heave the weight up, which strains the spine and uses momentum instead of the triceps.
  • Cutting the range of motion short at the bottom, which skips the deep stretch on the long head where the triceps works hardest.
  • Going too heavy and losing control overhead, which makes the movement unsafe and forces you to cheat the rep.

Preguntas frecuentes

What muscles does the dumbbell standing one arm extension work?

It isolates the triceps brachii, the muscle on the back of your upper arm. The overhead position emphasizes the long head of the triceps because that head is stretched when your arm is raised.

Why train one arm at a time instead of both?

Working one arm at a time lets you focus on each triceps separately, fix side-to-side strength imbalances, and use your free hand to steady the working elbow for better form.

How many sets and reps should I do?

As an isolation move, 3 sets of 10–15 reps per arm with a controlled weight works well. Triceps respond to moderate reps and a full stretch, so prioritize form over load.

Where should I feel this exercise?

You should feel it in the triceps along the back of your upper arm, with a clear stretch at the bottom as the dumbbell lowers behind your head. If you feel it mainly in the shoulder, keep your upper arm still and bend only at the elbow.

Is the dumbbell standing one arm extension good for beginners?

Yes, as long as you start light. The overhead single-arm position is harder to balance, so begin with a manageable dumbbell, support the elbow with your free hand, and add weight only once your form is solid.

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