Originally Answered: Low-carb, high-protein diet?
Yeah, there are some types of diets which try and fool the body by adjusting the calories up or down (around the normal required daily calorie intake), they called this "zig-zagging" and helps avoid or get past plateaus in weight loss diets. Of course to do this you need to have pre-determined your daily/weekly calories needs based on current body weight, target body weight and current activity levels. The calorie calculation is done via the BMR method (google Basal Metabolic Rate).
Low carb, high-protein is good for weight loss as long as physical activity is kept low to moderate, otherwise you could run into trouble with fatigue, as your blood sugar levels will drop due to low carbs.
Binging on carbs one day a week - well I dont know how many calories that would be, it depends on the type of carbs, but if your calorie surplus for that day was greater than the total calorie reduction for the previous 6 days....well, you see where I am coming from don't you? Also, a massive carbs binge will do all sorts of strange things to blood sugar and insulin levels, especially after the body has been carbs starved for the previous 6 days.
Personally, I started off on a similar diet to get back to my normal weight (13.5 st) which I am still on, though I had to up my carbs as I was running of out energy in the gym. I eat carbs with a low Glycaemic Index (GI) - they release their energy at a slower rate than sugary or starchy carbs and therefore keep you fuller for longer, rather than a short, intense sugar spike. Low GI foods - wholemeal pasta, brown rice, oats, green veggies, sweet potatoes, pulses etc. Occasionally, I 'binge' on carbs in the week (not every week, only as and when my body tells me that I need to) as I am trying to balance my weight loss needs against my nutritional needs for training at the gym 4 times a week (usually hard sessions with a mix of cardio, free weights and martial arts). These extra calories gained are an insurance policy during times of intense exercise - better to have a bit more fuel in the tank than consistently running on empty, as over-training and chronic fatigue syndrome are dark places for a fitness enthusiast/athlete, which can take literally months or even years to fully recover from.
A "carbs binge" for me would be one of the following
- two extra bowls of crunchy oat cereal,
- two or three, small, wholemeal pitta breads
- snacking my way through 200-300g dried dates (high carbs, from natural sugars though)
- or if im really naughty, 2 or 3 flapjacks. (saturated fats - bad, oats - good)
However, I am always conscious of this binge and try to regain some lost ground later on the week (though not all, as this would defeat any required carbs gains). If you are serious about losing weight, I would selectively choose your carbs beforehand and avoid binging on sugary, processed foods, chocolate, ice-cream, white breads, pastry-related products etc - yeah I know it sucks, cos all the yummy foods fall into this group. That's the price we have to pay for results
In short, you will lose weight with a low-carb, high protein diet, but after some time you would run out of energy, when your calorie intake dips below the minimum threshold for your needs, then your body will go into starvation mode and whatever you eat will be converted straight to fat and perversely, you will stop losing weight and may even put back on what you lost the previous week.
Other signs that your metabolism has effectively 'switched off' is the feeling of being cold all the time, beyond what is normal for you at this time of year.
Hmm, I appear to have rambled, however I feel there are some pearls in there somewhere and good luck! : )