This exercise develops the pectoral and deltoid muscles.
Lie down in a supine position onto the Fit-ball, feet are on the ground, hold a dumbbell in both of your hands and press them above your chest until your reach. Thumbs facing inwards. Let the weights down in a semicircle to the sides until the level of your chest. Lift the weights on the same arch to the starting position. Your arms should not be totally extended, rather bent in a comfortable angle because this way you ease the elbow joint. Breathe in deep when you let the dumbbells down and exhale when you lift them on the same arch.