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Barbells and dumbbells account for individual muscle tightness factors as well. Someone who works at a computer all day has different muscular restrictions than a mechanic. Plus, it is also actually harder to lock the machine into place when you are training with a heavier load since you have to force your wrists into a awkward position. Just showing more benefits of dumbbells and barbells Muscle Building Myth Advice 2- You must always stay with higher reps to build muscle http://www.healthcaresups.com/athletic-greens/