Exercise guide · evidence-graded

Barbell Curl

The barbell curl is the standard biceps exercise: standing with a palms-up grip on a straight bar, you bend your elbows to curl the bar from your thighs to your upper chest. It works both heads of the biceps and the brachialis underneath them, with the forearm muscles gripping and assisting.

Also called: BB Curl, Standing Barbell Curl, Bicep Curl (Barbell), Straight-Bar Curl · Equipment: barbell · Pattern: pull

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How to do it

Step by step

  1. Stand tall with your feet about hip-width apart and a slight bend in your knees. Hold the bar with a palms-up grip at about shoulder width, arms straight and the bar resting against your thighs.
  2. Brace your trunk and set your upper arms by your sides, elbows just in front of your hips. Keep your wrists straight, in line with your forearms.
  3. Bend your elbows to curl the bar up in an arc, moving only at the elbow. Your upper arms and torso stay still.
  4. Curl until your forearms are close to vertical and the bar is near your upper chest, with your elbows still by your sides. Squeeze the biceps briefly at the top.
  5. Bring the bar back down under control until your elbows are fully straight.
  6. Start the next rep from straight arms, without bouncing the bar off your thighs or leaning back.
  7. After the last rep, bend your knees and hips with a flat back to set the bar down, or return it to the rack.
Coaching cues
  • Elbows pinned by your sides
  • Only your elbows move
  • Wrists straight, in line with your forearms
  • Curl to the chest, then control the bar down
  • Straight arms at the bottom of every rep
  • Ribs down, no lean back

In VALDA, these cues are one tap away on the exercise while you train.

Muscles worked

What it trains

MuscleRoleEvidence
Biceps brachii: long headPrime moverC
Biceps brachii: short headPrime moverC
BrachialisSecondaryC
BrachioradialisSecondaryC
Forearm flexorsStabiliserD
Anterior deltoidStabiliserC

Evidence grades: A = strong research base · B = good · C = limited · D = coaching consensus.

Common faults

What goes wrong, and the fix

Swinging the bar up

Fix: Use a load you can curl with your torso still and your upper arms by your sides.

Elbows travelling forward at the top

Fix: Keep your elbows by your sides and finish when your forearms are near vertical.

Cutting the bottom of the rep short

Fix: Bring the bar all the way down until your elbows are fully straight on every rep.

Wrists curling in or bending back

Fix: Keep your wrists straight and in line with your forearms throughout.

Dropping the bar on the way down

Fix: Bring the bar down under control and reach straight arms without a bounce.

Programming

What the research says

Muscle growth · first choiceGeneral fitness · first choiceStrengthRehab & prehabEndurance

  • Load and reps — Research comparing loads finds muscle growth is similar across a wide range, from heavy sets of about 6 reps to light sets of 20 or more, when sets are taken close to failure. Heavier loads favour maximal strength.
  • Effort — Studies show growth rises as sets get closer to failure, but the curve flattens, and true failure adds only a small extra effect. Many lifters finish curl sets one to three reps short of failure.
  • Volume and frequency — Research links more weekly sets for a muscle to more growth, with diminishing returns; about 10 or more hard sets a week has been associated with more growth than fewer than 5. Spreading those sets over two or more sessions is a common approach.
  • Range of motion — In trained lifters, curls done through the stretched half of the range grew the elbow flexors about as much as full-range curls. In another trial, training only the top half produced less biceps growth near the elbow than training the bottom half.
  • Curls alongside rows and pull-ups — In untrained men, a curl and a multi-joint pulling exercise produced similar arm growth. Many programmes still add curls to give the biceps direct weekly volume.
Alternatives · VALDA FLEX

Swap it mid-workout

With VALDA Pro, FLEX offers alternatives like these when you swap an exercise mid-workout.

Log the barbell curl in VALDA, with these cues one tap away while you train and your history for it in one place.

General information about exercise technique, not medical advice. If you have an injury or a health condition, your healthcare provider is the right person to ask.