Those are basically muscle gains that occur because the body has never been trained that way before and whatever exercise you expose it to will force it to react by building new muscle mass. (fitnessandpower.com)
In fact, protein is such a vital component of human nutrition that we can not survive without it let alone hope to grow new muscle mass. (vegkitchen.com)
Use both training styles to gain new muscle mass and strength. (fitnessandpower.com)