Weighted Seated Bicep Curl (on stability ball) exercise animation (Männlich)

Weighted Seated Bicep Curl (on stability ball)

Zielmuskel
Brachialis
Synergistenmuskeln
Biceps Brachii, Brachioradialis
Equipment
Medicine Ball
Körperregion
Upper Arms
Typ
Strength

The Weighted Seated Bicep Curl on a stability ball is an elbow-flexion exercise that targets the brachialis — the flat muscle lying beneath the biceps — while the biceps brachii and brachioradialis act as synergists. Performing the curl seated on an unstable ball adds a core stability demand that complements the upper-arm work. It suits lifters who want to develop arm thickness and train balance simultaneously.

Weighted Seated Bicep Curl (on stability ball): So führst du sie aus

  1. 1Place a stability ball on a non-slip surface and sit on top of it with your feet flat on the floor, hip-width apart, so your hips and knees form roughly 90-degree angles.
  2. 2Hold a dumbbell in each hand with a neutral or supinated (underhand) grip, arms hanging at your sides, and allow the ball to settle under you before beginning.
  3. 3Brace your core, sit tall with a neutral spine, and fix your eyes on a point ahead of you to help maintain balance throughout the set.
  4. 4Pin your upper arms against the sides of your torso and keep them stationary for the entire movement — only your forearms should move.
  5. 5Exhale and curl both dumbbells upward in a smooth arc toward your shoulders, rotating your wrists to a full supinated position at the top if using a neutral starting grip.
  6. 6Squeeze the brachialis and biceps briefly at the top, keeping your elbows pointing straight down rather than drifting forward.
  7. 7Inhale and lower the dumbbells back to the starting position under control, fully extending your arms without letting them drop.
  8. 8Repeat for the desired number of repetitions while continuously re-engaging your core to keep the ball stable.

Technik-Tipps

  • Keep a light, active engagement of your core and glutes throughout each rep — this is what prevents the ball from rolling and keeps your torso upright.
  • Use a slower lowering phase (2–3 seconds) to increase time under tension on the brachialis and reduce the temptation to use momentum.
  • Start with lighter dumbbells than you would use on a bench; the balance demand of the ball reduces how much force you can safely direct into the curl.
  • If the ball moves under you when you curl, widen your foot stance slightly for a broader base — but avoid going so wide that it reduces the stability challenge.
  • For greater brachialis emphasis, keep the palms facing each other (hammer grip) throughout rather than supinating at the top.

Häufige Fehler

  • Swinging the torso to generate momentum: rocking back as the dumbbells rise shifts the load away from the brachialis and biceps, also destabilizes the ball and increases sprain risk.
  • Letting the elbows drift forward at the top: flaring the elbows forward shortens the range of motion and transfers load from the elbow flexors to the front deltoid, reducing stimulus on the target muscles.
  • Sitting too far forward or back on the ball: an off-center position shifts your center of mass, causing the ball to roll and forcing you to spend effort on balance recovery rather than on the curl itself.
  • Using too much weight too soon: loading more than your balance allows forces compensatory body movement that defeats both the elbow-flexion goal and the stability challenge the ball is meant to provide.
  • Rushing the eccentric (lowering) phase: dropping the weight quickly eliminates the lengthening contraction on the brachialis, which is where a significant portion of the hypertrophic stimulus comes from.

Häufig gestellte Fragen

Why target the brachialis instead of the biceps brachii?

The brachialis sits beneath the biceps brachii and, when developed, pushes the biceps upward, creating the appearance of a taller, fuller peak. It is a pure elbow flexor that cannot supinate the forearm, so any elbow-flexion exercise trains it regardless of grip position.

What grip gives the most brachialis activation in this exercise?

A neutral (hammer) grip throughout the curl emphasizes the brachialis and brachioradialis more than a fully supinated grip, which shifts some load toward the biceps brachii short head. Keeping the palms facing each other from start to finish is the most common way to bias the brachialis.

How is this different from doing seated curls on a bench?

The stability ball's unstable surface requires your core, hip, and postural muscles to fire continuously to keep you balanced, adding an anti-rotation and anti-extension demand that a fixed bench does not. The upper-arm movement is mechanically identical, but the overall training effect is broader.

How much weight should I use when starting this exercise?

Begin with dumbbells roughly 20–30 percent lighter than you would use for a standard seated curl on a bench, since the balance demand reduces the force you can direct cleanly into the curl. Progress the load only after you can complete the full set without the ball shifting under you.

Can beginners do this exercise, or is it only for advanced lifters?

Beginners can perform this exercise provided they start with light dumbbells and take time to find a stable seated position on the ball before adding resistance. Learning to control the ball simultaneously with curling can be a useful coordination skill, though beginners primarily focused on building arm strength may find a bench-supported curl more productive initially.

Ähnliche Übungen