Short Head Bicep Exercises: 10 Moves for Wider, Thicker Arms

Your biceps have two heads, and they respond to different arm positions. Move your elbows forward and the short head takes more of the work. Move them behind your body and the long head does. That is the entire mechanism behind targeted bicep training, and understanding it turns curl selection from guesswork into something deliberate.

But I want to set expectations honestly before we go further, because this corner of the internet oversells hard. You cannot switch one head off. Both heads share a tendon at the elbow and both contract on every curl you perform. What you can do is shift the emphasis, meaningfully but not dramatically, by changing where your elbows sit and how your wrist is turned.

There is also a third muscle almost nobody trains on purpose, and it does more for arm thickness than either bicep head. This guide covers all three.

The three muscles that make up your upper arm

The key structural detail is that the long head crosses the shoulder joint and the short head does not. That single difference is what makes arm position matter.

When your elbows travel behind your body, as in an incline curl, the long head is stretched across the shoulder and takes on more of the load. When your elbows come forward in front of your body, as in a preacher curl, the long head is shortened and slackened, so the short head contributes proportionally more.

The brachialis is the sleeper. It sits underneath the biceps and bends the elbow regardless of how your palm is turned. Developing it does two things: it adds genuine width to the arm when viewed from the side, and because it sits beneath the biceps, it pushes the biceps upward and makes them look fuller. It is trained by neutral and pronated grips, which is exactly what most bicep routines leave out.

Can you actually isolate the short head?

No, and being straight about this makes the rest of the advice more useful.

Both bicep heads join into one tendon at the elbow, and the nervous system does not recruit them independently the way it would two separate muscles. Every curl you do trains both.

What the research on this broadly supports is that arm position shifts the balance, producing measurably different activation between exercises, but the shift is a matter of degree rather than an on-off switch. A preacher curl is not a short head exercise. It is a bicep exercise that leans toward the short head.

The practical implication: do not build a routine from four short head exercises. Build one that covers both positions, then add a little extra emphasis where you want it. Two exercises with elbows forward, one with elbows behind and one neutral grip covers everything properly.

The three levers that shift emphasis

Supination, meaning turning the palm upward, is a genuine bicep function rather than just a grip choice. The biceps are the strongest supinator in your body. Curls that finish with a deliberate twist of the palm upward recruit the biceps more completely than curls performed with the wrist fixed.

10 exercises for the short head and brachialis

Short head emphasis: elbows forward

1. Preacher curl

Rest the backs of your upper arms on an angled pad, or the arm of a sofa, and curl from a fully straightened position. The pad fixes your elbows in front of your body and removes all momentum.

• Sets and reps: 3 sets of 8 to 12
• No preacher bench? Kneel behind a sofa arm or an incline bench set to 45 degrees and rest your arms over it
• Do not bounce out of the bottom. The fully straightened position is where the bicep is most vulnerable, so control the last few degrees

2. Spider curl

Lie chest-down on an incline bench with your arms hanging straight down, and curl. Your elbows sit well in front of your torso and gravity pulls directly downward, which means constant tension.

• Sets and reps: 3 sets of 10 to 12
• Arguably the best short head exercise available, because the resistance curve matches the movement well

3. Concentration curl

Sit with your elbow braced against the inside of your thigh and curl a single dumbbell. The braced elbow sits forward and the position makes cheating almost impossible.

• Sets and reps: 3 sets of 10 to 12 each arm
• Squeeze hard at the top for a full second

4. Wide grip barbell or EZ bar curl

A standard curl with the hands wider than shoulder width. The wider grip places the arms in a slightly more externally rotated position, which shifts emphasis inward.

• Sets and reps: 3 sets of 8 to 12
• An EZ bar is easier on the wrists than a straight bar for most people

5. High cable curl

With a cable set above head height, curl toward your head with the upper arms roughly parallel to the floor. If you train at home, a resistance band anchored in a door at head height works the same way.

• Sets and reps: 3 sets of 12 to 15
• The band version pairs well with the setups in our resistance band tricep workout guide

Brachialis: neutral and reverse grips

6. Hammer curl

Curl with palms facing each other throughout. The neutral grip takes the biceps out of their strongest position and shifts work to the brachialis and brachioradialis.

• Sets and reps: 3 sets of 10 to 12
• The most important exercise on this list if arm thickness is your goal

7. Cross-body hammer curl

Same neutral grip, but curl the dumbbell across your body toward the opposite shoulder rather than straight up.

• Sets and reps: 3 sets of 10 each arm

8. Reverse curl

Curl with an overhand grip, palms facing down. This is the strongest brachialis and brachioradialis exercise there is, and the weight will be considerably lighter than a normal curl.

• Sets and reps: 3 sets of 10 to 15
• Expect a large drop in weight, often 40 percent or more. That is normal and not a sign of weakness

Covering both heads

9. Incline dumbbell curl

Sit on a bench inclined to about 45 to 60 degrees and let your arms hang behind your torso. This stretches the long head and is the counterweight to the exercises above.

• Sets and reps: 3 sets of 10 to 12
• Include this even when focusing on the short head, because a balanced arm needs both

10. Chin-up

An underhand grip pull-up loads the biceps heavily under body weight, which is more resistance than most people ever curl.

• Sets and reps: 3 sets of 5 to 10
• If you cannot do one yet, our pull up alternatives guide covers the progression

Two arm routines

Routine A: dumbbells only, at home

Twice a week, around 20 minutes.

Routine B: full gym

Notice that both routines contain elbows-forward work, a neutral grip movement and one elbows-behind exercise. That is the template: emphasise what you want, but cover everything.

Sets, reps and frequency

Count your indirect work. This is the mistake that costs people progress. Every row, pull-up and pulldown on pull day trains the biceps hard. If you do a heavy back session with 12 sets of pulling, your biceps have already had a substantial workout. Adding 16 dedicated curl sets on top is usually more than you can recover from.

Biceps are small muscles that recover quickly, so two or three shorter sessions generally beat one long one. Leave at least 48 hours between hard direct bicep work.

The honest truth about bicep peaks

This needs saying, because a great deal of content implies you can build a peak with the right exercise.

The height of your bicep peak is determined mostly by the length of your muscle belly relative to its tendons. A person with a short muscle belly and long tendons will have a noticeably peaked bicep when flexed. A person with a long belly and short tendons will have a fuller, flatter-looking arm that often measures larger. That structure is set by genetics and no exercise changes it.

What you can change:

• Overall bicep size, which makes whatever shape you have more pronounced
• Brachialis development, which pushes the biceps up and can create the appearance of more peak
• Body fat level, since definition changes how visible the shape is
• The long head specifically, which sits where the peak forms

What you cannot change: where your muscle attaches, how long the belly is, and therefore the fundamental shape of the arm.

This is not a reason to train less. It is a reason to judge your progress by the tape measure and your working weights rather than by how closely your arm matches someone else’s.

Four technique details that change results

Curls look simple, which is why most people never refine them. These four adjustments change more than swapping exercises does.

1. Fix the upper arm in place

Whatever elbow position your exercise calls for, your upper arm should not move during the set. If your elbows drift forward as you curl, your front deltoids have taken over part of the lift and the biceps are doing proportionally less.

2. Control the last third of the descent

Most people lower the weight reasonably well until the final 30 degrees, then let it drop into full extension. That final portion is where the muscle is under the most stretch and where a large share of the growth stimulus sits. Take three seconds and stay in control to the bottom.

3. Supinate deliberately

On dumbbell curls, start with your palm neutral and rotate it upward as you lift, finishing with your little finger slightly higher than your thumb. The biceps are the body’s main supinator, and adding that rotation recruits them more completely than curling with a fixed wrist.

4. Stop the set when the form changes, not when you fail

Once your torso starts swinging or your elbows start travelling, the set has effectively ended. Extra reps gained through body movement train momentum rather than muscle, and they are where most elbow irritation begins.

Eight mistakes that limit arm growth

• Swinging the weight. If your torso rocks back on each rep, the load is too heavy and your lower back is absorbing it
• Only doing palms-up curls, which leaves the brachialis untrained and costs you real thickness
• Letting the elbows drift. Your upper arm should stay in one place for the whole set, wherever you have positioned it
• Cutting the bottom range short. A curl that stops halfway down trains half the muscle
• Bouncing out of the fully straightened position on preacher curls, which is the most common way people irritate a bicep tendon
• Adding curls on top of a heavy back day without counting the indirect volume
• Going too heavy on reverse curls. This exercise humbles everyone, and the weight should reflect that
• Training arms every day. They are small muscles but they still need recovery

Elbow and bicep tendon discomfort

Curling is a common source of elbow trouble, particularly when volume increases quickly.

Pain at the front of the elbow usually involves the distal biceps tendon and often follows heavy preacher curls or bouncing out of full extension.

Pain on the inner elbow relates to the forearm flexor tendons, commonly called golfer’s elbow, and is often linked to heavy gripping combined with curling volume.

What generally helps:

• Reduce the weight rather than stopping entirely. Tendons respond well to light controlled loading and badly to complete rest followed by a sudden return
• Slow the lowering phase to three or four seconds
• Stop bouncing at the bottom. Control the last few degrees into full extension
• Switch to neutral grip curls temporarily, which many people find more comfortable
• Add forearm and grip work to balance things out. Our forearm workout at home guide covers this
• Give it 8 to 12 weeks. Tendon adaptation is slower than muscle adaptation

Sharp pain, a popping sensation, visible bruising or a change in the shape of the muscle needs medical assessment rather than a training adjustment.

The bottom line

The short head sits on the inner arm and gets more work when your elbows are in front of your body, which is why preacher curls, spider curls and concentration curls are the exercises that emphasise it. The long head sits on the outside and prefers elbows behind the body, as in incline curls.

But you cannot isolate either one, and a routine built entirely around short head work leaves the other half underdeveloped. Cover both positions, then lean toward whichever you want to emphasise.

The most useful thing most people can add is neutral and reverse grip work for the brachialis, because that muscle sits under the biceps, adds genuine thickness, and is missing from almost every standard arm routine. Include hammer curls in every session and reverse curls in most of them.

Then be realistic about shape. Size is trainable and peak is largely inherited, so measure your arms and your working weights rather than comparing silhouettes.

For a full arm session that pairs these with triceps work, see our bicep and tricep workout.

The muscle beneath the biceps matters too. Our guide to brachialis exercises covers hammer curls, reverse curls and more.

For the outer head, which forms the peak, see our guide to long head bicep exercises.

Frequently asked questions

What are the best short head bicep exercises?

Preacher curls, spider curls, concentration curls, wide grip barbell curls and high cable curls. All five place your elbows in front of your torso, which shortens the long head and shifts a greater share of the work to the short head on the inner side of your upper arm.

Can you isolate the short head of the bicep?

No. Both heads share a tendon at the elbow and contract together on every curl, so you cannot switch one off. Arm position shifts the emphasis measurably but not completely, which means exercises like preacher curls lean toward the short head rather than isolating it.

Does the short head or long head make your arms look wider?

The short head, viewed from the front. It sits on the inner side of the upper arm, so developing it increases the apparent width of your arms when facing a mirror. The long head sits on the outer side and forms the peak you see when the arm is flexed from the side.

What exercises hit the brachialis?

Hammer curls, cross-body hammer curls and reverse curls. The brachialis bends the elbow regardless of grip, so it takes over when the biceps are placed in a weaker position by a neutral or overhand grip. Expect to use considerably lighter weights on reverse curls than on standard curls.

How do I get a bicep peak?

Peak height is mostly determined by your muscle belly length relative to your tendons, which is genetic and cannot be changed by training. You can make whatever shape you have more pronounced by building overall bicep size, emphasising the long head with incline curls, developing the brachialis underneath, and reducing body fat.

How many sets of biceps per week?

Twelve to sixteen direct sets per week for muscle growth, spread across two or three sessions. Count the indirect work from rows, pull-ups and pulldowns as well, since a heavy back day already trains the biceps substantially. Adding a full curl routine on top of that often exceeds what you can recover from.

Can you train the short head with just dumbbells at home?

Yes. Preacher curls over a sofa arm or an inclined bench, concentration curls with your elbow braced on your thigh, and spider curls lying chest-down over a sofa back all place the elbows forward. Add hammer curls and reverse curls for the brachialis and the routine is complete.

Why do my elbows hurt when I curl?

Usually a rapid increase in curling volume, bouncing out of the fully straightened position, or going too heavy. Reduce the weight rather than stopping entirely, slow the lowering phase to three or four seconds, control the bottom of each rep, and give it eight to twelve weeks, since tendons adapt more slowly than muscle.

What’s next?

Reading is the easy part. Pick one of these and do it today.

Use a free toolStrength CalculatorEstimate your one-rep max and see sensible working weights.Follow a plan4-Week Beginner ProgramShort sessions, walking and rest days, laid out day by day. You can get each week by email too.Read nextLong Head Bicep Exercises: 10 Best Moves for a Bigger Biceps PeakThe guide that fits best with this one.