Muscle Size, Shape & Definition Workout. How to build muscle and size - An increase in muscle mass occurs as a result of gains in strength combined with a caloric surplus. This is the definition of a bulk. For the sake of this article let's assume that your goal is to gain muscle size while staying lean. To be more specific, you want your muscle mass to increase, with your body fat ... #massgainingworkout

Muscle Size, Shape & Definition Workout. How to build muscle and size - An increase in muscle mass occurs as a result of gains in strength combined with a caloric surplus. This is the definition of a bulk. For the sake of this article let's assume that your goal is to gain muscle size while staying lean. To be more specific, you want your muscle mass to increase, with your body fat ... #massgainingworkout

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