"Stop fearing muscle bulk — accidental over-muscling is nearly impossible A drug-free competitive bodybuilder who has trained for 25 years tells clients who fear getting too muscular: "I have tried for 25 years to get too muscular" and in a t-shirt still just looks like a fit athlete. He compares the fear to "getting into a car and worried you're going to become a NASCAR driver" — it simply does not happen by accident. Anyone with genuinely exceptional genetics for muscle growth can always dial back volume and proximity to failure, so the fear should never be a reason to avoid resistance training. Source: Lane Norton, Forever Strong Experience, Nutrition and Body Composition Episode"