A variation of the popular exercise for the biceps.
Lie down against an incline bench, hold the dumbbells with an underhand grip.
Slightly bend your elbows, your feet should be placed on the floor firmly.
From the starting position, as you exhale, lift the dumbbells up slowly without moving or swinging your body.
Do not pause at the top, return to the starting position as you inhale.
You can raise both hands simultaneously or alternately.
Try to change the bench angle depending on the flexibility of your shoulders.
Do not extend your arm too far back as it can cause injury to your ligaments.