How to do Dumbbell fly
Begin lying down on your back on a bench with the legs bent and feet planted firmly on the ground. (Note: If your feet don’t touch the ground, place a plate underneath each foot).
Hold dumbbells in your hands near your chest with a neutral grip (palms facing each other). Your shoulder blades should be down and back, squeezing together the entire time.
Press the dumbbells up toward the ceiling as you straighten both arms while keeping the palms facing each other. The dumbbells can be touching at the top. This is the start position.
Lower the dumbbells out to the side in a “T” away from each other. Keep lowering them down toward the ground until you feel a stretch in the chest.
Then, raise the dumbbells back up toward each other to the start position.
Repeat for the desired repetitions.