So you believe that if you are on a completely protein diet and are eating in excess of your daily caloric maintenance level that you will not gain weight?It's more a matter of being on a 2200 calorie diet and what's the balance of macronutrients? Is it fat 20, protein 30, carbs 50? That'll make you fat unless you are burning the carbs with exercise. Or is it fat 35, protein 45, carbs 20 and the carbs are low glycemic index complex carbs? You probably don't need to workout to lose weight. Your blood sugars will be lower, requiring less insulin. Low IR. It's just better for you.