WhatWorksWhat.
Biceps

Barbell Curl

A stretching pull on the front of the upper arm in the bottom third, then a hard squeeze at the top.

Complexity · Lowhypertrophybeginner+Barbell
Check Your Form
  • Biceps
  • Biceps - Inner biceps
  • Biceps - Outer biceps
  • Forearms
  • Outer biceps
  • Inner biceps
  • Underneath biceps
  • Forearm peak

PrimarySecondary

What it hits

Parts of the target muscle.

  • Outer biceps

    Hit

    Long head - recruited more with elbows behind the body.

  • Inner biceps

    Hit

    Short head - recruited more with elbows in front of the body.

  • Underneath biceps

    Not hit

    Brachialis - pushes the bicep up. Loves neutral grip.

  • Forearm peak

    Not hit

    Brachioradialis - recruited with pronated or hammer grip.

The movement

Get it right, not roughly right.

Optimal form

9:54· Jeff Nippard

How To Build Huge Biceps: Optimal Training Explained

Barbell Curl start position with arms extended, elbows pinned, and barbell held at thigh level.
Start
Barbell Curl finish position with barbell near the chest, elbows close to the ribs, and torso upright.
Finish

Stand tall, shoulder-width grip, supinated. Elbows pinned to your ribs. Curl the bar by flexing the elbows - not by swinging the torso. Squeeze at the top, lower under control over ~2 seconds.

Tempo · 2-0-1-1

Common mistakes

  • Swinging hips to launch the bar - kills bicep tension.
  • Elbows drifting forward - turns it into a front raise.
  • Half-repping the bottom - long head only grows when fully stretched.

Where you should feel it

A stretching pull on the front of the upper arm in the bottom third, then a hard squeeze at the top.

Injury risk · 1/10

SafetyWrist tightness is the first warning sign - switch to the EZ-bar variation before pushing through it.

Progression

Step back, or step up.

Same movement family, different rung. Harder versions sit above, easier versions below — tap a rung to land there.

  1. Progress toChin-upCompound pull - biceps under twice the load.
  2. Progress toIncline dumbbell curlAdds the deep long-head stretch most lifters are missing.
  3. You're hereBarbell Curl
  4. Step back toEZ-bar curlSlight angle is easier on the wrists.
  5. Step back toDumbbell curlLighter load, one arm at a time.

Variations

Same movement, moved emphasis.

Ranked by how directly each variation still trains biceps. 80%+ means the target barely changes. Below 60%, the emphasis has meaningfully shifted — useful for variety, but less precise for the specific part. The label calls it at a glance.

  • EZ-bar curl

    Slight angle, easier on wrists.

    95% on target

    On target

    Same target, minor adjustment.

  • Wide grip

    Hands wider than shoulders.

    90% on target

    On target

    More short head (inner).

  • Narrow grip

    Hands inside shoulders.

    90% on target

    On target

    More long head (outer).

  • Reverse-grip (pronated)

    Palms down.

    35% on target

    Off target

    Brachioradialis & forearms - no longer mostly biceps.

Compare with another exercise

Cool-down

Worked it. Walk it back down.

A couple of minutes here pays back in soreness avoided tomorrow. Browse the full library.

  • Wrist Flexor Stretch

    Arm extended in front, palm up. Use the other hand to pull the fingers down and back toward the body. Elbow stays locked. 30s per side.

    ForearmsBiceps

  • Wrist Extensor Stretch

    Arm extended, palm DOWN. Pull the back of the hand down and toward the body. 30s per side. Cheap fix for cranky elbows after pulling days.

    Forearms

  • Biceps Doorway Stretch

    Stand in a doorway. Place a palm flat on the door frame at shoulder height, fingers up, thumb pointing away. Rotate the chest away from the wall to feel a stretch down the front of the upper arm. 30s per side.

    BicepsChestFront delts

Evidence