1- Stand with legs slightly apart and knees bent while leaning forward at the waist and keeping the back straight.
2- Grasp the dumbbells with neutral grip, arms hanging down while elbows slightly bent, this is your starting position.
3- Now inhale and raise your arms out horizontally to their sides.
4- Exhale at the end of the movement and then return slowly to the starting position, repeat.
Tips and Advices:
1- Keep your back and body steady as possible, only arms moving.
2- Avoid locking the elbows as that would cause additional stress on them.
You can also perform this exercise on an incline bench, laying on it while face down.