Mistake 6: Not varying your volume
Take a scientific approach to build massive arms. As with any muscle group, there are fast-twitch and slow-twitch muscle fibers, each adapting to a different level of volume and intensity. Spend 3–4 weeks developing a specific fiber and then cycle to another one.
Do you always do 3 sets of 8 reps of bicep curls? Add massive volume with band-resisted curls and do as many as you can until failure (40 or more reps) for a few weeks. Do you always do drop sets? Try going extra heavy and repping out only 5 reps for 4 or 5 sets.
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