Dumbbell Supine Flyes to train chest muscles
Lie on your back on a bench, holding dumbbells with your fists facing each other; stretch your arms straight up and perpendicular to the ground, and place your feet flat on the ground. Let your hands fall apart to both sides, with your elbows slightly bent until you can't go any lower. Stay still for a second to allow the pectoralis major to fully stretch, then raise your arms up from both sides and return to the starting position. Don't clench your hands tightly. When parting your arms, tighten your back muscles. Focus on the contraction and extension of the pectoralis major muscle.
