Straight Barbell Curl: how to do it right
In short: The straight bar curl isolates the biceps with maximal tension at mid-range, when the forearm is close to horizontal.
How to do it, step by step
- 1Standing braced, feet hip-width apart, bar in supination with hands shoulder-width apart, arms extended.
- 2Elbows tight to the torso and fixed: they serve as the pivot and don't drift forward.
- 3Bend the elbows to curl the bar up continuously, with no jerk or torso momentum.
- 4Control the phase where the biceps lengthens on the way back with arms almost extended, without fully relaxing.
- 5Keep a smooth rhythm, about 2 seconds up, 2 to 3 seconds on the way back.
The mistake to avoid
Don't bend your wrists backward as you curl the bar.
Other common mistakes
- Swinging the torso to throw the bar: lock the bracing and reduce the load to stay strict.
- Letting the elbows drift forward at the top: keep them fixed against the torso, otherwise the effort leaves the biceps.
- Only curling halfway up: go through the full range while managing the mid-range tension.
- Releasing abruptly at the bottom: control the return instead of letting the bar drop.
Muscles worked
- Main:
- Biceps
- Supporting:
- Forearms
The biceps brachii is the prime mover, especially its short head engaged by the close grip and the elbows near the torso. The brachialis (under the biceps) and the forearm's brachioradialis assist the flexion and stabilize the wrist.
What to replace it with
Same muscle, same part of the movement: these exercises do the same job.
- Standing EZ-Bar Curl ›
- Standing Dumbbell Biceps Curl ›
- Kettlebell Biceps Curl ›
- Low Cable Barbell Curl ›
- Hammer Curl ›
Frequently asked questions
How do I do this exercise?
Standing braced, feet hip-width apart, bar in supination with hands shoulder-width apart, arms extended. Elbows tight to the torso and fixed, they serve as the pivot. Bend the elbows to curl the bar up continuously with no jerk or torso momentum, then control the return with arms almost extended.
How high should I curl the bar?
Full range, arms almost extended at the bottom and elbow closed at the top, but without pausing at the top to catch your breath because tension drops. The load peak is at mid-range, forearm horizontal, so stay continuous and controlled so as not to exploit the rest zones. Don't only curl halfway up.
I don't feel anything, is that normal?
You should feel the work in the biceps. Slow down around the forearm's horizontal to maximize time under tension where it counts. Check that your elbows stay tight and fixed, if they drift forward the effort leaves the biceps. A moderate load and clean execution beat sloppy heavy weight.
How fast do I do the movement?
About 2 seconds up, 2 to 3 seconds to lower with arms almost extended. Deliberately slow down around the forearm's horizontal, that's where tension reigns. No momentum, a smooth and strict movement.
How do I breathe?
Inhale with arms extended, exhale during the rise as you pass the hard mid-range zone. Keep your belly braced and your pelvis stable so the back doesn't compensate.