"Tempo is the time or speed at which you perform reps of an exercise," Moretti said. "Most people subconsciously use a timing that's two seconds up, two seconds down." Instead, Moretti said to try doing exercises at a tempo that's six to eight seconds, hold the bottom position for one count, then lift back up in a six- to eight-second tempo for a maximum burn that will increase the difficulty of your exercises. Try these tempo push-ups as a test run.