Dumbbell Lying Alternate Extension

How to Do It

1. Lie flat on a bench with a dumbbell in each hand, palms facing each other.
2. Extend your arms straight up over your chest, keeping a slight bend in your elbows.
3. Lower one dumbbell down towards your head, bending at the elbow, while keeping the other arm extended.
4. Pause for a moment at the bottom, then raise the dumbbell back up to the starting position.
5. Repeat with the other arm, alternating sides for the desired number of repetitions.