1. Grasp a dumbbell in each hand and lie back on a flat bench. Hold the dumbbells at shoulder level with palms facing each other and push the weights together hard so you feel your pecs flex. (It’s best if you use hexagonal dumbbells so the sides fit against each other evenly.)
2. Press the weights directly above you until your arms are fully extended—maintain the contraction in your pecs. Pause at the top for one second, flexing your chest as hard as you can. Then lower the weights to your chest and pause for one second before beginning the next rep.