Drag curls do emphasize the long head of the biceps more than standard curls. The key mechanism is shoulder extension: by pulling your elbows behind your torso as you curl, you place the long head in a more stretched and mechanically active position throughout the movement. This makes drag curls one of the more practical exercises for targeting that outer portion of the biceps that many lifters find difficult to develop.
Why the Long Head Responds to This Movement
The biceps has two heads that share the same insertion point near the elbow but originate from different places on the shoulder blade. The short head attaches to the front of the shoulder blade, while the long head originates higher up, at the top of the shoulder socket. Because the long head crosses the shoulder joint from this higher position, its tension changes depending on where your upper arm sits relative to your torso.
When your elbows drift behind your body, as they do during a drag curl, the long head gets stretched across the shoulder joint while simultaneously contracting to flex the elbow. This dual demand increases the work it has to do compared to the short head. In a standard curl, your elbows stay roughly at your sides or drift forward, which shortens the long head at the shoulder and shifts more of the load to the short head and the brachialis (the muscle underneath the biceps).
This is also why incline dumbbell curls, where your arms hang behind your torso on a bench, are frequently recommended alongside drag curls for long head development. Both exercises use shoulder extension to bias the same head.
How to Perform a Drag Curl Correctly
Stand holding a barbell or EZ bar with an underhand grip at about shoulder width. Instead of curling the bar outward in an arc like a traditional curl, drag it straight up along the front of your body. Your elbows should travel backward as the bar rises, not forward and not out to the sides. The bar should stay in contact with (or very close to) your torso throughout the entire rep.
Continue dragging the bar up until it reaches chest level. Some lifters take it higher, up toward the base of the neck, for a fuller range of motion and a stronger peak contraction. At the top, squeeze hard before lowering the bar back down the same path with control.
You’ll notice immediately that drag curls force you to use significantly less weight than standard curls. That’s the point. The movement eliminates almost all momentum and cheating, which is actually what makes it effective. Bodybuilding trainer Vince Gironda, who popularized the exercise, specifically designed it so that the strict bar path would make it nearly impossible to swing the weight up. The reduced load doesn’t mean reduced stimulus. It means the biceps are doing a higher percentage of the actual work.
Common Mistakes That Reduce Long Head Emphasis
The most frequent error is letting your elbows drift forward during the curl. The moment your elbows move in front of your torso, the movement becomes closer to a standard curl and the long head advantage disappears. Think of your elbows as hinges that only swing backward.
Going too heavy is the second biggest problem. Because the leverage is unfavorable by design, loading the bar like a regular curl almost always leads to compensating with your shoulders, traps, or lower back. If you find yourself shrugging the weight up or leaning back to finish reps, the load is too high. Drop the weight until you can feel the contraction entirely in your biceps.
Rushing the lowering phase is the third mistake. The eccentric (lowering) portion of the drag curl is where a significant amount of the muscle-building stimulus happens. Let the bar travel back down your body over two to three seconds rather than dropping it quickly.
How to Program Drag Curls for Growth
Drag curls work best as an accessory movement rather than your primary biceps exercise. The limited range of motion and lighter loads mean they pair well with a heavier compound movement like chin-ups or standard barbell curls earlier in your workout.
For hypertrophy, three to four sets of 10 to 15 reps works well. The lighter loads and strict form lend themselves to moderate and higher rep ranges where you can maintain tension throughout each set. Rest periods of 60 to 90 seconds keep the metabolic stress high without sacrificing form on later sets.
You can perform drag curls with a straight barbell, an EZ bar, dumbbells, or a Smith machine. The Smith machine version locks the bar path vertically, which some lifters find helpful for learning the movement. Dumbbells allow each arm to work independently but make it harder to keep the “drag” path tight against your body. For most people, a barbell or EZ bar is the simplest starting point.
Drag Curls vs. Other Long Head Exercises
Drag curls aren’t the only way to target the long head, and they work best as part of a broader approach rather than your sole strategy. Incline dumbbell curls place the long head under an even deeper stretch at the bottom of the movement because your arms hang behind your torso at roughly 45 degrees. Hammer curls (with a neutral grip) also shift emphasis toward the long head and the brachialis, though for different mechanical reasons related to forearm position rather than shoulder angle.
Where drag curls have a unique advantage is convenience and peak contraction. You don’t need a bench, and the top position of the movement creates an intense squeeze that incline curls can’t replicate because tension drops off at the top of that movement. Using both exercises in a program gives the long head strong stimulus at different points in the range of motion: incline curls for the stretched position, drag curls for the shortened position.
Two long head exercises per week, each performed for three to four sets, is generally enough volume to see noticeable development over eight to twelve weeks when combined with progressive overload.