This exercise lays emphasis on the biceps and develops the stabilizers.
Sit down on the exercise ball, grasp the dumbbells with an underhand grip.
Slightly bend the elbows, your feet should be placed on the floor firmly.
From the starting position, as you exhale, lift up the dumbbells slowly without moving or swinging your body.
Do not pause at the top, return to the starting position as you inhale.
The main task is not only to lift the dumbbells to your biceps but also to keep your balance.
You can raise both hands simultaneously or alternately.