How to Do the Preacher Curl for Building Bigger Biceps

Here’s a step-by-step guide that will put you in the right position to get the most out of this biceps curl variation using an EZ curl bar.

Step 1 — Set Up

Sit down on the preacher curl machine and adjust the seat height so your upper arms and chest rest on the bench pad. Or, if there is no seat, stand behind the preacher curl bench so your arms and chest are in the correct position. You should have a slight forward lean so that the pad touches your armpits. Then, use an underhand grip to grab the curl bar.

Step 2 — Curl the Weight

With your chin tucked, wrists neutral, and elbows extended fully, contract your biceps and curl the bar toward your shoulders. Squeeze at the top of the movement and hold for one to two seconds.

Step 3 — Lower to Starting Position

Execute the eccentric portion of this curl exercise by slowly straightening your elbows. Maintain complete control during the descent, carefully lowering the curl bar back to the starting position before repeating the full sequence for the desired number of reps.

[Related: How to Do the Reverse Biceps Curl for Complete Arm Development]

Preacher Curl Mistakes to Avoid

Want to get the best return on your investment in building bigger biceps? Here are a few common mishaps people make when performing preacher curls that can prevent you from reaping the rewards of your training program.

Taking the Strength Training Approach

Working with intense loads for a limited number of reps will not yield the best results if you’re focused on maximum biceps growth. While that style of training works well for compound movements like the back squat, bench press, and deadlift, you shouldn’t treat the preacher curl like a strength-building exercise.

Instead of going ultra-heavy, use a manageable weight that you can perform for sets of 10-12 repetitions with perfect form. This will provide a better stimulus for hypertrophy than a low-rep, high-intensity protocol more suited to powerlifting.

Incorrect Setup

Getting in the proper position should be the priority when you’re preparing to perform the preacher curl. That means your chest and upper arms should be in contact with the pad at all times. Having the bench set too low or too high will make it difficult (if not impossible) to execute the movement correctly, causing you to leave gains on the table by shifting the focus away from your biceps.

Failing to Use Full Range of Motion

[Related: Jon Call “Jujimufu” Absolutely Crushes a 161-Pound Preacher Curl PR]

Benefits of the Preacher Curl

What makes the preacher curl such a popular choice for lifters of all shapes and sizes? Let’s take a look at some of the ways it pays off to pencil this biceps exercise into your workout routine.

Direct Biceps Development

A true isolation exercise, the preacher curl provides a direct route to growing your biceps by removing your ability to use your lower half for any assistance. The angle of the bench pad allows you to completely stretch the muscle and maximize time under tension — a key factor in hypertrophy training.

Of course, squeezing at the top of the movement is critical for getting the most muscle-building returns. Overall, the preacher curl challenges your biceps during the concentric and eccentric parts of the exercise to create a fantastic stimulus for sculpting well-developed arms. 

Assists with Pulling Exercises

If you want to be more successful at chin-ups or other pulling exercises, the preacher curl can assist with those efforts. Having strong biceps will allow you to move the weight more efficiently and avoid overtaxing other muscle groups as you perform pull-based exercises. 

Eliminates the Cheating Element

Chances are you’ve probably seen at least a few gymgoers contorting their bodies to swing out some poorly executed curls before finally admitting defeat. However, sacrificing form to execute any exercise makes little sense — especially if you’re concerned about maximizing muscle growth. 

Luckily, though, the preacher curl curtails your ability to cheat by keeping you grounded and eliminating the idea of using your legs for a boost. Once you set up properly on the machine and grab your free weight of choice, your biceps will quickly learn what it means to be isolated. More importantly, you’ll understand the value of performing slow, controlled reps using a full range of motion — and zero cheating. 

[Related: Jay Cutler Breaks Down His Workout to Build 20-Inch Arms]

How to Program the Preacher Curl

For Beginners: Perform a warm-up set of eight to 12 reps with a light weight to ensure you’re using proper form. Using a moderate weight, complete two to three working sets of eight to 12 reps.

For Muscle Growth: Complete three to four sets of eight to 12 reps with a moderately heavy weight. For even more gains, decrease the weight and perform a drop set until failure.

For Muscular Endurance: Select a light-to-moderate weight that you can curl for 15 to 20 reps. After you finish your first set, rest briefly for 20 to 60 seconds before repeating for two more sets.

[Related: Try These Biceps Workouts Without Weights for Muscle, Strength, and Fat Loss]

Preacher Curl Variations

From changing your grip to swapping out the EZ bar preacher curl for a dumbbell-based version, some simple tweaks can shift this exercise in a different direction. Here are some variations you can consider implementing to keep things fresh in the gym:

Dumbbell Preacher Curl

Leaving the barbell behind for a pair of dumbbells will open the door to new bicep-building possibilities. Not only can you work on any imbalances by training unilaterally, but you can also experiment with different grips to change the stimulus. For example, hammer-style preacher curls with a neutral grip will involve your forearm muscles more.

Close-Grip Preacher Curl

Using the same setup as the traditional preacher curl, this version targets the long head of the biceps by having you put your hands closer together.

Wide-Grip Preacher Curl

You can employ the opposite strategy to hit the short head by using a wide grip. For the best results, incorporate both grip variations into your biceps training program.

Reverse Preacher Curl

Whether you use a barbell, EZ curl bar, or dumbbells, a reverse preacher curl will force your brachioradialis to rise to the occasion. Grasping the bar with a pronated (palms-down) grip and keeping your arms in a fixed position to curl the weight makes this biceps exercise particularly useful for developing stronger forearms.

Preacher Curl Alternatives

Don’t have access to a preacher curl bench? You can still train your biceps with these muscle-building alternatives.

Incline Dumbbell Biceps Curl

Concentration Curl

Similar to the preacher curl, the concentration curl keeps your upper arm in a fixed position that stabilizes your shoulder. This isolation exercise is an excellent example of the benefits of unilateral training, as you get to attack each side independently while your triceps remain anchored to the inside of your knee to make your biceps do all the work.

Standing Barbell Curl

An option that doesn’t involve sitting down, the standing barbell curl has withstood the test of time as one of the most basic, yet effective biceps exercises. Unlike some of the other alternatives and variations, this movement forces you to engage your glutes and core as you curl the weight. In addition, it also activates your anterior deltoid when the barbell is in the fully curled position.

Spider Curl

Take advantage of gravity and leverage to enhance your muscle-building experience by incorporating spider curls into your training program. Also referred to as the reverse incline curl, this exercise has a similar set-up as the chest-supported row. But instead of pulling your elbows back to target your lats, rhomboids, traps, and rear delts, you’ll contract your biceps to curl a barbell (or dumbbells) toward you.

Let Your Gains Preach for Themselves

Building bulging biceps requires plenty of high-quality reps that recruit the two-headed muscle to fully stretch and contract. While there are ample curl variations that can help you achieve that rounded look, the preacher curl deserves to be near the top of your biceps exercise list because it makes you stay strict with your form and removes momentum from the equation. Earmark it for pull day or whenever you work on your arms and get ready to show off the fruits of your labor when you flex.