Arm Day is an upper body workout that helps your arms develop the kind of mitochondrial density necessary for increased power and greater endurance. Go deep on the push-ups and rotate on the ball of the foot that's on the same side as the arm throwing a punch to put the body's weight behind each thrown punch. Maintain form. Go hard and go fast. Add EC because in this particular workout it will only help you achieve greater endurance.
Extra Credit: 1 minute rest between sets.