In order for people to get bigger, especially women, there are two things that you would have to make a concerted effort to do. One: pick up very heavy weight on a frequent basis. This is not something we do. Yes, we are very much concerned about your strength and we do lift heavy some days. But this is not our main focus. Two: eat an extremely high calorie diet. For most to gain productive muscle mass takes quite the effort in eating the right foods in a high amount. This is also something that we do not focus on. The majority of the workouts we do provide your muscles with more contractile potential and not hypertrophy (muscle mass).