Barbell Curl (How To, Muscles Worked, Benefits)

The Barbell Curl is a classic arm-building exercise that targets the biceps with heavy, direct tension. It allows you to use more load than other curl variations, making it ideal for building bicep strength and size.

When performed with strict form, it’s a simple and effective way to focus on arm development.

Primary Muscles Worked: Biceps Brachii
Secondary Muscles Worked: Forearms (Brachioradialis), Brachialis
Equipment Needed: Barbell (straight or EZ-bar)

How To Do Barbell Curls

Step-by-Step Instructions

Set-Up:
- Stand tall with feet shoulder-width apart, holding a barbell with an underhand (supinated) grip.
- Hands should be about shoulder-width apart or slightly narrower.
- Let the bar rest against your thighs with arms fully extended and elbows tight to your sides. Brace your core.
Execution:
- Curl the bar upward by contracting your biceps and bending your elbows—keep your upper arms stationary.
- Raise the bar until it reaches about shoulder level or just below.
- Squeeze at the top, then slowly lower the bar back to the starting position under control.
Tips for Proper Form:
- Keep your elbows tucked to your sides—don’t let them drift forward.
- Avoid using momentum or swinging your hips.
- Focus on a smooth, full range of motion and muscle contraction.

Key Benefits

Builds bicep size and strength using heavier loads.
Simple and scalable—great for beginners and experienced lifters alike.
Can be done with a straight or EZ-bar to suit wrist comfort.

Modifications and Variations

Easier Option:
- Use an EZ-bar to reduce wrist strain.
- Perform the movement seated against a wall or bench to limit body movement.
Harder Option:
- Use a slow tempo (e.g., 3 seconds up, 3 seconds down).
- Try pause reps or mechanical drop sets with different grip widths.
- Add a band or chains for variable resistance.

Common Mistakes

Swinging the Bar: Don’t use your hips—keep the movement strict.
Letting Elbows Drift Forward: This reduces bicep tension and turns it into a shoulder movement.
Partial Reps: Lower all the way down to stretch the biceps fully between reps.

Reps and Sets Recommendations

For Strength: 3–4 sets of 6–8 reps with heavier weight and strict form.
For Hypertrophy: 3–4 sets of 10–12 reps with controlled tempo.
As an Arm Day Finisher: 2–3 sets of 12–15 reps or burnout sets to failure.

Barbell Curl Alternatives

If you’re unable to do barbell curls (or maybe you just want to change up your workout a bit), here are a few barbell curl alternatives.

If you’d like even more options to do in place of Barbell Curls, check out my 10 favorite Barbell Curl Alternatives.

Seated DB Curls

Seated Dumbbell Curl — Turn a Hammer Curl into a Regular Curl by simply turning the palm up as you curl.

If you don’t have a barbell, but you do have dumbbells – Seated DB Curls are a great alternative to Barbell Curls. They can also be a good choice if you can only work one arm due to a limitation and/or injury.

Band Curls

Band Curls are another good barbell curl alternative if you don’t have access to a barbell. If you have a resistance band, simply stand on the band and curl. One of the easiest exercises to pick up for a beginner.