▸ Arms

Seated Close-Grip Concentration Barbell Curl

BicepsBarbell

intermediate · isolation · strength

You sit on a bench, brace the backs of both upper arms against your inner thighs and curl a bar with a narrow supinated grip. Your legs act as the preacher pad, which kills every trace of shoulder swing and forces the elbow to do all of it — but the close grip on a straight bar is what will bother your wrists first.

▸ How to

Own the movement

Set up first, then execute. Every cue below is something you can check on your next set.

Before the first rep

Sit on the end of a flat bench with your feet flat and your knees spread wide enough that the bar can pass between them.
Load an EZ bar rather than a straight bar if you have one — the angled grip saves the wrists.
Take a supinated grip just inside shoulder width, then lift the bar and settle the backs of your upper arms onto your inner thighs.
Sit the arms about 8-10 cm back from your knees, not right on the kneecap, so the pressure lands on soft tissue.
Let the bar hang at full arm's length with your elbows straight before the first rep.

Every rep

Curl the bar forward and up in an arc, keeping the backs of the upper arms pressed into your thighs the whole time.

Push your thighs gently outward against your arms — that counter-pressure is what stops the elbows drifting.

Finish with the bar at chest height and the biceps fully shortened; squeeze for a second there.

Keep your wrists straight and stacked over the forearm. A bent-back wrist is your first sign the grip is too narrow for you.

Lower over three seconds until your elbows are completely straight, then start the next rep from a dead stop.

Breathing & tempo — Exhale as the bar rises, inhale as it lowers. One second up, one second squeezed at the top, three seconds down, then a full stop at the bottom.

▸ Programming

Sets, reps & load

Where to start, and what to change when it stops being hard.

Hypertrophy

3 sets of 8-12

Endurance

2-3 sets of 12-15

Start with an empty EZ bar, which is usually 7-10 kg, and expect to use roughly 60-70% of your standing barbell curl. Good looks like a dead stop at the bottom of every rep with no torso lean. Add 2.5 kg once you get 12 strict reps on all sets; before that, add reps.

▸ Fix your form

What goes wrong

The errors that show up most often, and the cue that fixes each one.

Rocking the torso forward and back to move the bar.

Sit tall with your chest up and lock the position by pressing your feet into the floor. If the torso moves, take 5 kg off and restart the set.

Cutting the bottom of the rep short so the arms never straighten.

Pause for a full beat with the elbows locked out at the bottom of every rep. Half reps here feel harder but train a fraction of the muscle length.

Wrists bending backwards under a narrow straight-bar grip.

Switch to an EZ bar and take the inner angled grip, or widen your hands to shoulder width. Wrist pain here is a hardware problem, not a toughness problem.

Sliding the arms forward onto the knees as fatigue sets in.

Reset the arms behind the knee at the start of every set and keep outward pressure from the thighs. Once they slide onto the knee the bench turns into a hinge and the elbows unload.

▸ The case for it

Why bother

Wedging the triceps against your inner thighs fixes the elbow in space more completely than a preacher bench does, because your legs push back against any attempt to let the upper arm drift. The result is a curl in which the only variable left is elbow flexion, so the rep quality is honest at every load you can hold.

The narrow grip is the part people get wrong. It does not hand the work to one head of the biceps — hand spacing on a curl changes where your wrists sit, not which head fires, and the case for picking heads by grip width has never held up. What it genuinely changes is supination demand: hands inside shoulder width on a straight bar force the forearms to turn further against the load, which is why the wrists complain before the biceps do.

Where it fits

Second or third arm movement of the session, after a standing barbell or dumbbell curl has done the heavy work. Two to three sets in the 8-12 range. It is a poor first exercise — the seated position and the fixed elbow cap the load well below what a standing curl allows, so use it to finish rather than to build.

▸ Swap it out

If this one isn't it

No kit, too hard, or too easy — here's where to go instead.

▸ Questions

Asked and answered

Straight bar or EZ bar for this?

EZ bar for most people. The close grip on a straight bar forces full supination with the wrists locked in line, and that combination is what makes the inner forearm and wrist ache. The EZ bar's angle lets the hands sit a few degrees more neutral and costs you almost nothing in biceps tension.

Does a close grip build the biceps peak?

No. Grip width does not let you select a head of the biceps, and peak height is mostly the long head plus the shape of the muscle belly you inherited — neither responds to where your hands sit on the bar. A close grip changes wrist angle and how hard your forearms have to supinate, and nothing else. If you want to bias the long head, change the shoulder position instead: incline curls put it on stretch, this movement does not.

How is this different from a preacher curl?

The preacher bench sets a fixed pad angle; your thighs set a steeper one and push back actively. That means slightly less stretch at the bottom than a preacher curl and a stronger lockout of the upper arm. It also needs no specialist bench, which is usually why people choose it.

My arms bruise where they press on my thighs. What can I do?

Sit the arms further back from the knee onto the soft part of the thigh, wear longer shorts or lay a folded towel across your legs. Bruising means bone-on-bone contact at the knee, which also means your elbow position is drifting forward as you fatigue.