Lie on your back with your hips and knees both at 90-degree angles (tabletop legs). Using your lower abs, press your lower back into the mat. Raise your arms toward the ceiling, palms facing each other, keeping the elbow joints slightly bent.
Keeping your torso stable, open your arms out to the sides until your elbows are about two inches from the floor.
Raise your arms back to the ceiling, bringing the weights together over your chest. This counts as one rep.
Perform two to three sets of 10 to 12 reps.
The chest fly definitely works your pecs and upper arms, but holding the tabletop leg position is no joke. Focus on pulling your low abs to your spine to keep your pelvis stable.