Barbell Lying Preacher Curl exercise animation (Male)

Barbell Lying Preacher Curl

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

The barbell lying preacher curl is an isolation exercise that primarily targets the brachialis, the muscle beneath the biceps that drives elbow flexion, with strong assistance from the biceps brachii and brachioradialis. Performed with the upper arms braced against a preacher pad while lying along the bench, it locks out momentum and forces the elbow flexors to do the work through a strict range of motion.

How to do the Barbell Lying Preacher Curl

  1. 1Set up a preacher bench so you can lie along it with your chest supported and the backs of your upper arms resting flat against the angled pad.
  2. 2Grip a barbell with an underhand (supinated) grip slightly narrower than shoulder-width and let your arms hang fully extended over the pad.
  3. 3Brace your core and keep your shoulders down, with your armpits pressed into the top edge of the pad.
  4. 4Curl the bar upward by flexing your elbows, keeping your upper arms glued to the pad and your wrists straight.
  5. 5Continue until your forearms approach vertical and you feel a strong contraction in the front of your arms.
  6. 6Pause briefly at the top without letting your elbows drift forward or your shoulders roll up.
  7. 7Lower the bar under control back toward full extension, resisting the weight the whole way down.
  8. 8Stop just short of fully dropping into a locked, hyperextended elbow position, then begin the next rep.
  9. 9Complete your reps, then set the bar down safely on the rack or pad with control.

Form tips

  • Keep your upper arms flat against the pad for the entire set — if they lift off, the angle is wrong or the weight is too heavy.
  • Squeeze the bar and keep your wrists in a neutral, straight line with your forearms to keep tension on the elbow flexors rather than the wrists.
  • Use a slow, controlled lowering phase (2–3 seconds) to build strength through the lengthened portion of the curl.
  • At the bottom, don't relax completely and let the loaded bar yank your elbows into a hard, hyperextended lockout — stay just short and keep tension to protect the joint.
  • Drop the weight before adding reps; the braced position makes cheating obvious, and a strict bar speed beats heavy momentum here.

Common mistakes

  • Letting the upper arms slide up off the pad to gain leverage, which turns the strict curl into a swinging movement and removes tension from the brachialis.
  • Dropping the bar quickly at the bottom and bouncing out of a hyperextended elbow, which stresses the elbow joint and biceps tendon under load.
  • Using a weight so heavy you can't reach full extension, cutting the range of motion short and limiting the strength built at the bottom.
  • Bending the wrists back as you curl, which shifts strain to the wrists and forearms instead of the target muscles.
  • Shrugging or rolling the shoulders forward to heave the bar up, which recruits the upper traps and front delts rather than isolating the elbow flexors.

Frequently asked questions

What muscles does the barbell lying preacher curl work?

It primarily targets the brachialis, with the biceps brachii and brachioradialis assisting. Bracing the upper arms against the pad isolates these elbow flexors and minimizes momentum.

How is the preacher curl different from a standing barbell curl?

The preacher pad pins your upper arms in place, so you can't swing the weight up with your hips or shoulders. That makes it stricter than a standing curl and shifts more emphasis onto the lower part of the range and the brachialis.

Should I fully straighten my arms at the bottom?

Lower to near-full extension to train the muscle through its full range, but stop just short of a hard, locked-out, hyperextended elbow. Dropping into a loose lockout under load stresses the elbow and biceps tendon.

Is the barbell lying preacher curl good for beginners?

Yes. The braced position makes it hard to cheat, so it teaches strict form. Start light to groove the movement and to keep your elbows safe at the bottom of each rep.

How many sets and reps should I do?

For arm size and strength, 3–4 sets of 8–12 controlled reps works well. Keep the bar moving slowly and prioritize full, clean range of motion over heavier loads.

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