Reverse Barbell Curl
The reverse barbell curl flips your grip so your palms face down instead of up, turning a familiar biceps movement into a forearm and brachialis builder. Your biceps still work through the range, but the pronated grip shifts a good share of the load onto the muscles running along the top of the forearm and the outer edge of the upper arm. It suits lifters who already curl regularly and want more grip strength and forearm size to go with it, and anyone who wants sturdier hands for rows, deadlifts, and farmer carries.
Why it works
Turn the palms down and the biceps brachii loses some of its usual mechanical advantage, since supination is the motion it's built to produce. That weaker pulling angle hands more of the work to the brachialis underneath it, plus the brachioradialis and wrist extensors along the forearm, all of which fight to keep the bar from rolling forward out of a pronated grip. The exercise trades some raw biceps output for a forearm and grip stimulus a standard curl barely touches, which is why most lifters use it alongside their regular curl work instead of replacing it.
Set up
- Load the bar noticeably lighter than your regular curl weight; the pronated grip is a much weaker position.
- Stand with feet hip-width apart and knees soft, gripping the bar overhand just outside shoulder width.
- Let the bar hang at arm's length against your thighs with your wrists straight, not cocked back.
- Brace your core and pin your elbows to your sides before the first rep.
How to do it
- Curl the bar upward by bending your elbows, keeping your upper arms locked against your torso.
- Keep your wrists flat and firm the entire way up; don't let them break backward to help the bar rise.
- Raise the bar until your forearms are close to vertical, or until your grip starts to give, whichever comes first.
- Pause briefly at the top and feel the tension across your forearms and the outside of your upper arms.
- Lower the bar back down under control, resisting the weight rather than letting it drop.
- Stop just short of locking the elbows out at the bottom and begin the next rep.
Form cues
- Flat wrists, never bent back.
- Elbows pinned to your sides.
- Load lighter than your normal curl.
- Slow the bar down on the way back.
Breathing: Exhale as you curl the bar up, inhale as you lower it back down.
Common mistakes
Loading the bar as heavy as a regular curl.
Fix: Drop the weight by roughly a third to a half; the pronated grip is a genuinely weaker position, not a minor variation on the regular curl.
Letting the wrists bend backward to compensate as grip fatigue sets in.
Fix: Keep the wrists flat throughout the set. If they start to break, end the set there instead of muscling through it with poor wrist position.
Swinging the torso or hips to help sling the bar upward.
Fix: Keep your upper arms still against your sides so your forearms and biceps do the lifting, not momentum from your back and hips.
Letting the bar drop quickly on the way down.
Fix: Lower it over a full two or three seconds. Most of the forearm training effect from this exercise happens during that lowering phase.
How to program it
- Three or four sets of 10 to 15 reps suits this well, since the forearms and grip tend to fatigue before the biceps do.
- Place it after your main pulling or curling work rather than before it, so early grip fatigue doesn't sabotage lifts that need a strong hold.
- Because the load is light and the joints involved are small, most lifters can handle it two to three times a week without much soreness carrying over.
- If your forearms are already fried from deadlifts or rows earlier in the session, save this movement for a different day.
Safety notes
- Stop the set the moment your wrists start bending backward under load; that means the weight has beaten your grip, not your biceps.
- Skip heavy loading here if you already deal with wrist or elbow discomfort, since the pronated grip puts more strain on both joints than a standard curl does.
Exercise profile
- Force
- Pull
- Mechanics
- Isolation
- Category
- Strength
Frequently asked questions
What does the reverse barbell curl work?
It trains the biceps along with the brachialis and the forearm muscles running down the top of the forearm, especially the brachioradialis, more than a standard curl reaches.
How much weight should I use for reverse curls?
Expect to use noticeably less than your regular curl, often 30 to 50 percent lighter, since the pronated grip is a much weaker pulling position.
Reverse curl vs regular curl: what's the difference?
A regular curl uses a palms-up grip that favors the biceps directly. The reverse curl's palms-down grip shifts more of the work onto the brachialis and forearms.
Can I do reverse curls without a barbell?
Yes. A cable bar or a pair of dumbbells held with a pronated grip trains the same muscles if a barbell isn't available.