Grab a dumbbell in each hand and lay down on a bench, bringing the dumbbells beside your chest. Keep your elbows at a 90-degree angle and your forearms perpendicular to the floor. Once here, keep your palms facing away from you, exhale and press the dumbbells towards the ceiling.
Squeeze your pectoral muscles when your arms are at full extension. Once you have completed this, inhale and bring your arms back down beside your chest until your elbows are at 90-degrees once more.
Repeat the movement for the recommended amount of repetitions.