Are Reverse Curls Good For Forearms? | The Truth About Grip

Most gym-goers walk past the forearm rack without a second thought. The arm day checklist usually starts with standard bicep curls, tricep pushdowns, and maybe some hammer curls for the brachialis. Reverse curls tend to get overlooked, often because they look awkward on the EZ bar and feel uncomfortable on the wrists. Many lifters assume any curl variation works the same muscles, just from a slightly different angle.

When asking are reverse curls good for forearms, the honest answer is yes — but they fill a specific role that other curls don’t. By flipping your grip from palms-up to palms-down, you shift the mechanical load from the biceps brachii to the brachioradialis and forearm extensors. That makes them a strong option for building functional grip strength and forearm size, assuming the form is dialed in and the weight isn’t too heavy.

What Makes The Reverse Curl Different

The biggest difference between a standard curl and a reverse curl is the grip. A palms-up (supinated) grip maximizes biceps involvement because the biceps is a supinator of the forearm. Flip to an overhand (pronated) grip, and the biceps loses that mechanical leverage. The load shifts almost entirely to the brachioradialis, the primary forearm muscle that runs from the upper arm bone down to the wrist.

The brachialis, a muscle hidden underneath the biceps, also steps up during reverse curls. A well-developed brachialis pushes the biceps upward, which can contribute to thicker-looking upper arms. Some fitness blogs suggest this indirect brachialis work is a hidden benefit of the exercise. The forearm extensors on the top of the forearm also activate heavily to stabilize the wrist against the overhand pull.

The Forearm-Muscle Connection

The brachioradialis is responsible for elbow flexion and forearm rotation — the same motions used when gripping a heavy barbell, carrying a suitcase, or pulling a rope in a battle-rope drill. That makes forearm hypertrophy from reverse curls functionally useful, not just aesthetic.

Why The Forearm Focus Matters

Big arms don’t come from biceps alone. The forearm is what most people see when you roll up your sleeves, and weak forearms can limit your deadlift and row numbers more than you’d expect. Here is what reverse curls specifically contribute to that goal:

• Brachioradialis Activation: This muscle sits on the thumb side of the forearm. Reverse curls activate it more than almost any other curl variation because of the mechanical disadvantage the overhand grip creates.
• Forearm Extensor Engagement: The muscles on the top of the forearm (extensors) are largely ignored by standard curls. Reverse curls force them to stabilize the wrist, which can lead to better wrist health and balanced arm development over time.
• Grip Strength Transfer: A stronger brachioradialis directly supports pulling exercises like deadlifts, rows, and pull-ups. Many lifters report feeling a tighter grip on the barbell after adding reverse curls consistently.
• Aesthetic Balance: Overdeveloped biceps with underdeveloped forearms can create a top-heavy, disproportionate look. Reverse curls help fill out the lower arm, giving a more balanced athletic silhouette.

That said, reverse curls are not a replacement for dedicated grip work or wrist curls. They target specific forearm muscles, but a complete forearm routine usually benefits from multiple exercises.

Reverse Curls vs. Other Forearm Exercises

If your goal is forearm size, how do reverse curls stack up against the alternatives? The short answer is that they occupy a useful middle ground between hammer curls and wrist curls. Hammer curls target the brachioradialis and brachialis while keeping biceps engaged. Reverse curls create higher activation in the forearm extensors and brachioradialis, making them more forearm-focused. This “forearm extensor activation” is what makes the reverse curl a unique tool, something Soletreadmills’ guide to forearm extensor activation breaks down in detail.

For optimal forearm growth, many trainers suggest incorporating both reverse curls and hammer curls into your routine rather than choosing just one. The two exercises complement each other well — one emphasizes the extensors, the other keeps the biceps and brachialis in the mix.

How To Perform A Reverse Curl Correctly

Done right, the reverse curl is straightforward. The main challenge is keeping your ego in check and your elbows pinned down. Here is how to dial in the form:

1. Set Your Grip: Hold an EZ bar or two dumbbells in front of your thighs with an overhand, shoulder-width grip. The EZ bar tends to be more comfortable on the wrists than a straight barbell.
2. Lock Your Upper Arms: Keep your elbows glued to your ribs and stationary throughout the movement. If your elbows drift forward or backward, the forearms stop doing the work, and the biceps or shoulders take over.
3. Controlled Curl: Breathe out and curl the weight toward your shoulders, squeezing at the top of the movement. Stop before your forearms hit your biceps.
4. Lower Slowly: Resist the urge to drop the weight. A slow, controlled negative phase increases time under tension and reduces reliance on momentum.

The number one mistake is using weight that is too heavy. When the load exceeds the forearm’s capacity, lifters compensate by swinging the torso or pulling with the shoulders. Dropping the weight by ten to twenty pounds and prioritizing control is almost always the right move.

Addressing The Downsides And Common Mistakes

Reverse curls are generally considered safe, but they come with a learning curve — especially if you have tight wrists or a history of elbow tendinopathy. Wrist strain is the most common complaint, usually caused by using a straight barbell instead of an EZ bar or letting the wrist collapse into extension under load. Some resources, like Speediance’s guide to improve arm width grip, highlight how the exercise can build brachialis and brachioradialis thickness, but only if the wrists remain stable throughout the movement.

Starting with light weights for a few weeks is highly recommended so the tendons and wrist joints can adapt to the new angle. If sharp pain persists beyond the first two sessions, the exercise may not be a good fit for your current wrist mobility. In that case, wrist curls or pronated pulls from a cable machine might be better alternatives.

When performed with controlled form and sensible load progression, reverse curls can be a reliable addition to any arm-building program. They tend to work best when added gradually and paired with at least one or two other forearm exercises.

The Bottom Line

Yes, reverse curls are a good exercise for building forearm strength, size, and brachioradialis activation. They work best as part of a balanced arm routine that includes hammer curls and direct grip work. The key to getting value from them is form, not load — controlled reps with moderate weight are much more effective than sloppy reps with a heavy bar.

A qualified strength coach or physical therapist can help determine if reverse curls fit well with your existing training volume and any wrist or elbow limitations you may have.