Lie on the floor while holding dumbbells in your hands over your chest with your arms fully locked out. Your knees should be bent with your feet firmly planted into the ground. Lower the weights until your upper arm touches the floor. In order to maximize tricep stimulation, ensure that you are keeping your elbows as tucked as possible. Flaring the elbows will place more emphasis on your chest muscles. Pause at the bottom of the movement, with your upper arm in contact with the floor, before using your tricep muscles to lock your arms out via elbow extension. Repeat for the prescribed number of repetitions.