Issue = my interpretation of your statement - "If you're 2k below what you're using". I read that [as a stand-alone statement] as the total deficit not just the decreased caloric intake without counting energy expenditure. ah not a big deal. Even counting energy expenditure you could make a rationale argument that theoretically losing a pound a day is possible due to the number of calories in a pound muscle. The real point though was your body is going to take time to take off the fat, but muscle atrophy is much easier. At 1k calories even if it's entirely protein that's only 250g. counting protein's TEF that takes it down to 175, and the double workout will wreck that number even further through gluconeogenesis. I have no idea how much energy that process takes but I do know it's far from ideal. That's essentially why ketogenic diets work so well but the amount of protein intake is MUCH higher... and generally there are still some carbs. Even so, I lost significant amounts of muscle on it compared to a slower method of dieting. If you want to maintain any semblance of muscle, a huge defecit is definitely not the right way to go about it imho. Otherwise you might hit your weight goal but be skinny-fat and still not look any better.