Set an adjustable bench to a high incline (e.g., 45-60 degrees).

Stand facing the bench, lean forward, and place the backs of your upper arms firmly against the incline pad.

Hold a dumbbell in each hand with an underhand (supinated) grip, arms extended.

Keeping upper arms pressed against the pad, curl the dumbbells towards your shoulders by flexing your elbows.

Squeeze biceps at the top.

Slowly lower the dumbbells back to the starting position with control.

Repeat for desired repetitions.