The Chest Fly is a strength training exercise primarily targeting the pectoral muscles in the chest. It involves lying on a bench and extending the arms out to the sides with weights, then bringing them together above the chest. This movement helps to improve muscle definition and strength in the upper body. To perform the Chest Fly, start by lying flat on a bench with a dumbbell in each hand. Keep a slight bend in the elbows as you lower the weights out to the sides, then raise them back to the starting position. Proper form is essential to avoid injury and maximize effectiveness.