Jacked Alpha Test Except otherwise mentioned, all of the exercises in muscle building programs are performed by using a barbell. If you only have 30-45 minutes for your workout and you spend it all on a cardio machine, when are you going to train the rest of your muscles and sculpt a better body? Your body must intake the correct and necessary substances that it needs to supply you with muscle. Since there are so many options available in this field, one can often get confused about the best options that they can select.