EZ Barbell Seated Curls exercise animation (Male)

EZ Barbell Seated Curls

Target muscle
Biceps Brachii
Synergist muscles
Brachialis, Brachioradialis
Equipment
EZ Barbell
Body part
Upper Arms
Type
Strength

EZ barbell seated curls are an upper-arm isolation exercise that primarily targets the biceps brachii, with the brachialis and brachioradialis assisting. Performed seated on a bench with an EZ (cambered) bar, the angled grip eases wrist strain and the seated position limits body sway, keeping tension on the biceps.

How to do the EZ Barbell Seated Curls

  1. 1Sit upright on the end of a flat bench with your feet flat on the floor and your back tall.
  2. 2Take an underhand grip on the EZ bar at the inner angled section, hands roughly shoulder-width apart, and rest the bar across your thighs.
  3. 3Pin your upper arms against your sides and keep your elbows fixed close to your torso.
  4. 4Curl the bar upward by flexing at the elbows, keeping your wrists neutral and your upper arms still.
  5. 5Squeeze your biceps hard at the top, stopping just before the bar reaches your shoulders to keep tension on the muscle.
  6. 6Lower the bar under control along the same path until your arms are nearly fully extended.
  7. 7Complete your reps, then set the bar down on your thighs and rack it safely.

Form tips

  • Keep your upper arms locked to your sides so the movement happens only at the elbow, isolating the biceps.
  • Use the angled grip of the EZ bar to keep your wrists in a comfortable, neutral position and reduce wrist strain.
  • Control the lowering phase over 2–3 seconds rather than dropping the bar, since the lengthened portion builds size and strength.
  • Sit tall with your core braced to stop your torso from rocking and turning the curl into a swing.

Common mistakes

  • Swinging the torso or using momentum to lift the bar, which shifts work off the biceps and strains the lower back.
  • Letting the elbows drift forward as you curl, which recruits the front shoulders and shortens the range the biceps actually work through.
  • Bouncing the bar at the bottom or cutting the rep short, which removes tension at the strongest stretch and reduces the stimulus.
  • Letting the wrists bend back under load, which stresses the wrist joint instead of loading the biceps.
  • Going too heavy and rounding the back to heave the weight, raising injury risk and cheating the rep.

Frequently asked questions

What muscles do EZ barbell seated curls work?

They primarily work the biceps brachii, with the brachialis and brachioradialis (forearm) assisting to flex the elbow and curl the weight.

Why use an EZ bar instead of a straight bar for curls?

The EZ bar's angled grip puts your wrists in a more neutral, semi-supinated position, which reduces wrist and forearm strain while still loading the biceps effectively.

Are seated curls better than standing curls?

The seated position makes it harder to swing or use your legs, so it forces stricter form and keeps tension on the biceps. Standing curls allow more weight but invite cheating.

How many sets and reps should I do?

For arm growth, 3–4 sets of 8–12 reps with a controlled tempo is a sensible default. Pick a weight you can lift without rocking your torso.

Are EZ barbell seated curls good for beginners?

Yes. The seated setup and angled grip make form easy to learn and reduce wrist discomfort, so beginners can focus on isolating the biceps.

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