dumbbell standing one arm extension

How to do this exercise

1. Step:1 Stand with your feet shoulder-width apart, holding a dumbbell in one hand.
2. Step:2 Raise the dumbbell overhead, fully extending your arm.
3. Step:3 Keep your upper arm close to your head and perpendicular to the ground.
4. Step:4 Slowly lower the dumbbell behind your head, bending your elbow.
5. Step:5 Pause for a moment, then raise the dumbbell back to the starting position.
6. Step:6 Repeat for the desired number of repetitions.