How many sets and reps of the concentration curl should a beginner do?

As a finisher, 2 to 3 sets of 12 reps per arm with a light-to-moderate dumbbell is plenty. Chase a harder squeeze at the top before you chase a heavier weight.

What can replace the concentration curl if you don't have a dumbbell?

The cable concentration curl or the band concentration curl both brace the same way against your thigh and train the biceps peak without a dumbbell.

What is the concentration curl good for, and when is it not the right choice?

It's a peak-contraction and mind-muscle finisher, best used at the end of an arm workout. It's a poor choice as an early, heavy-loading exercise in a session; save the heavy compound curls for when you're fresh and use this after.

Beginner

Concentration Curl

Bracing your elbow on your thigh eliminates all swing and delivers one of the highest biceps activation readings of any curl in EMG comparisons. It is a classic peak-contraction and mind-muscle-connection exercise, best used as a finisher when you want strict, focused reps. The fixed elbow makes it very easy to learn.

Equipment: Bench, Dumbbell
Body part: Biceps
Type: Strength
Browse by muscle: Biceps Brachii Short Head, Biceps Brachii Long Head
Browse by movement: Elbow Flexion

How to do it

1
Sit on a bench with your feet wide and a dumbbell in one hand.
2
Lean forward slightly and brace the back of that upper arm against your inner thigh.
3
Let the arm hang extended, palm facing the opposite leg.
4
Curl the dumbbell up toward your shoulder while supinating the wrist.
5
Squeeze hard at the top, then lower slowly to a full stretch.
6
Exhale as you curl, inhale as you lower.

Tips

Keep the working upper arm pinned to your thigh so only the forearm moves.
Twist the pinky up at the top for a full contraction of the biceps.
Go slow and light; this is about squeeze and control, not load.

Variations

Common mistakes

The torso rotates toward the working arm at the top of the rep, letting body rotation finish the last few degrees the biceps couldn't.
The elbow slides off the inner thigh as the weight gets heavier, since a bigger dumbbell is harder to keep braced in place through the whole set.
Forgetting to rotate the wrist toward the pinky-up position at the top leaves the peak contraction on the table this exercise is specifically built to chase.
Leaning the whole upper body forward and down to start the rep uses gravity and back extension instead of a clean biceps contraction.
Once the weight feels easy for the target reps, jumping straight to a much heavier dumbbell defeats an exercise whose entire value is the strict squeeze, not the load.

Frequently asked

How many sets and reps of the concentration curl should a beginner do?: As a finisher, 2 to 3 sets of 12 reps per arm with a light-to-moderate dumbbell is plenty. Chase a harder squeeze at the top before you chase a heavier weight.
What can replace the concentration curl if you don't have a dumbbell?: The cable concentration curl or the band concentration curl both brace the same way against your thigh and train the biceps peak without a dumbbell.
What is the concentration curl good for, and when is it not the right choice?: It's a peak-contraction and mind-muscle finisher, best used at the end of an arm workout. It's a poor choice as an early, heavy-loading exercise in a session; save the heavy compound curls for when you're fresh and use this after.

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