Watch Body Beast - Tempo: Chest & Tris (2012) : Full Movie Online Free Tempo Chest/Tris: The number of repetitions you do while training is very important. Almost as important as how long your muscles contract during each rep. Tempo Training is one of the most effective ways to keep your muscles under tension for longer periods of time, which helps you increase your overall strength and definition. If you want to get cut, tempo training is how you get there—and fast.