
The concentration curl isolates the biceps, with the elbow pressed against the thigh.
Sitting on a bench with your legs spread, hold a dumbbell and wedge the back of your arm against the inside of your thigh, with your arm straight.
Bend your elbow to raise the dumbbell toward your shoulder, then lower slowly until your arm is straight.
Only your forearm moves: your shoulder and torso remain still.
Image and text: Bryl Lim / Everkinetic — recoloré et rastérisé — CC BY-SA 4.0, via Workout Guide. Original entry