Instructions:

1. Stand up straight with a dumbbell in each hand, palms facing your body.
2. Keep your elbows close to your torso and rotate your palms to face forward.
3. Curl the dumbbells up to your shoulders while keeping your upper arms stationary.
4. At the top of the movement, rotate your wrists so that your palms are facing away from your body.
5. Slowly lower the dumbbells back to the starting position, rotating your palms back to facing your body.
6. Repeat for the desired number of repetitions.