Cable Seated One Arm Concentration Curl exercise animation (Hombre)

Cable Seated One Arm Concentration Curl

Músculo objetivo
—
Equipamiento
Cable
Parte del cuerpo
Upper Arms
Tipo
Strength

The cable seated one arm concentration curl is a single-arm isolation exercise for the upper arm, performed seated with a low cable pulley. Bracing your elbow against your inner thigh removes momentum and locks the upper arm in place, so the curl works the biceps through a strict range of motion. The cable keeps constant tension on the muscle from bottom to top, making it a precise finisher for arm size and the peak of the biceps.

Cómo hacer el Cable Seated One Arm Concentration Curl

  1. 1Set the pulley to the lowest position and attach a single handle. Place a bench or seat a comfortable distance from the cable stack.
  2. 2Sit on the bench with your feet flat and spread slightly wider than shoulder-width, leaning forward from the hips.
  3. 3Grip the handle with the working arm and brace the back of that upper arm against the inside of your thigh, just above the knee.
  4. 4Let the arm hang almost straight so the cable pulls it into a slight stretch, keeping a small bend at the elbow to maintain tension.
  5. 5Curl the handle up toward your shoulder by contracting the biceps, keeping your upper arm pinned to your thigh and your wrist neutral.
  6. 6Squeeze the biceps hard at the top, then lower the handle slowly under control back to the stretched starting position.
  7. 7Complete all reps on one side, then switch the handle to the other hand and repeat for an equal number of reps.

Consejos de técnica

  • Keep the upper arm completely still against your thigh so the elbow is the only joint that moves — this is what makes the curl strict.
  • Lower the handle slowly (a 2–3 second negative) to use the cable's constant tension through the full range.
  • Pause and squeeze for a beat at the top of each rep to maximize the contraction at the peak of the biceps.
  • Sit far enough from the stack that the cable stays taut even at the bottom, so the muscle never fully unloads.
  • Pick a weight you can curl without leaning back or yanking the handle; control beats load on an isolation move.

Errores comunes

  • Swinging the torso or rocking back to lift the handle, which shifts work off the biceps and onto the back and momentum.
  • Lifting the upper arm off the thigh, which turns the strict curl into a sloppy partial rep and reduces tension on the biceps.
  • Dropping the handle quickly on the way down, wasting the negative where the cable applies the most useful tension.
  • Cutting the range of motion short at the bottom, which trains only the easy middle of the curl and limits the stretch.
  • Bending the wrist back toward you to help hoist the weight, which strains the wrist instead of loading the biceps.

Preguntas frecuentes

What muscles does the cable seated one arm concentration curl work?

It isolates the biceps of the upper arm. Bracing the elbow against your thigh removes help from other muscles, so the biceps does the work through a strict range of motion.

Why use a cable instead of a dumbbell for concentration curls?

A cable keeps constant tension on the biceps from the bottom stretch to the top squeeze, whereas a dumbbell feels lightest at the bottom and top. That steady tension can make the cable version feel more demanding rep for rep.

How many sets and reps should I do?

As an isolation finisher, 3 to 4 sets of 10 to 15 reps per arm works well. Use a controlled weight you can curl strictly, since this exercise is about tension and form rather than heavy loading.

Is the cable concentration curl good for beginners?

Yes. Bracing the upper arm against your thigh makes it hard to cheat with momentum, so it teaches strict curling form and is a safe, simple way for beginners to feel the biceps work.

What's a good alternative to the cable concentration curl?

The dumbbell concentration curl is the closest free-weight version and uses the same braced-arm position. Any single-arm cable curl is another option that keeps constant tension on the biceps.

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