Performing the: A Step-by-Step Tutorial Cross-over Revers Fly
Bend your knees slightly and bend over at the waist while keeping your back straight, so your torso is almost parallel to the floor.
Extend your arms in front of you so they are perpendicular to your torso, with the weights meeting at the center.
Keeping your arms slightly bent, open your arms to the sides (in a reverse fly) until they are parallel to the ground.
Slowly lower the dumbbells back to the starting position in front of you, crossing one over the other, and repeat the exercise for the desired number of repetitions.