The underlying formula for gaining weight whether it be fat or muscle is consuming more calories than you expend. How much of it is gained as fat or muscle is dependent upon what is consumed, how it is distributed, and specific individual factors (genetics, current condition, extra curricular lifestyle and its impact on your physical condition, training protocols).
It's that simple. If you actually counted your calories, and monitored your eating habits in a log book, I'm sure you'd find it to be pretty inconsistent. |